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September 11 attacks
Top to bottom, left to right The Twin Towers of the World Trade Center on fire; Collapsed section of the Pentagon; Flight 175 crashes into 2 WTC; A fireman requests assistance at Ground Zero; An engine from Flight 93 is recovered; Flight 77's collision with the Pentagon as captured by CCTV.
Location	Manhattan, New York City; Arlington County, Virginia; vicinity of Shanksville, Pennsylvania
Date	September 11, 2001; 23 years ago (2001-09-11) 8:46 – 10:28 a.m. (EDT)
Target	World Trade Center (AA Flight 11 and UA Flight 175) The Pentagon (AA Flight 77) Washington, D.C. (UA Flight 93; unsuccessful)
Attack type	Aircraft hijackings Suicide attacks Mass murder Terrorism
Deaths	2,996  (2,977 victims + 19 hijackers)
Injured	6,000+
Perpetrators	al-Qaeda (see also responsibility and hijackers)

The September 11 attacks (also referred to as September 11, September 11th, or 9/11) were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda on the United States in New York City, New York, and Arlington County, Virginia, on the morning of Tuesday, September 11, 2001.

Four passenger airliners which all departed from the U.S. East Coast to California were hijacked by 19 al-Qaeda terrorists to be flown into buildings in suicide attacks. Two of the planes, American Airlines Flight 11 and United Airlines Flight 175, were crashed into the North and South towers, respectively, of the World Trade Center complex in New York City. Within two hours, both 110-story towers collapsed with debris and the resulting fires causing partial or complete collapse of all other buildings in the WTC complex, including the 47-story 7 World Trade Center tower, as well as significant damage to ten other large surrounding structures. A third plane, American Airlines Flight 77, was crashed into the Pentagon (the headquarters of the United States Department of Defense) in Arlington County, leading to a partial collapse in its western side. The fourth plane, United Airlines Flight 93, was targeted at Washington D.C., but crashed into a field near Shanksville, Pennsylvania, after its passengers tried to overcome the hijackers. In total, 2,996 people died in the attacks including the 245 civilians, a law enforcement officer, and the 19 terrorists aboard the four planes. It was the deadliest incident for firefighters and law enforcement officers in the history of the United States, with 343 and 72 killed respectively. The attacks also caused at least $10 billion in property and infrastructure damage.

Suspicion for the attack quickly fell on al-Qaeda. The United States responded to 9/11 by launching the War on Terror and invading Afghanistan to depose the Taliban, which had harbored al-Qaeda. Many other countries also strengthened their anti-terrorism legislation and expanded law enforcement powers. Although al-Qaeda's leader, Osama bin Laden, initially denied any involvement, in 2004, he claimed responsibility for the attacks. Al-Qaeda and bin Laden cited U.S. support of Israel, the presence of U.S. troops in Saudi Arabia, and sanctions against Iraq as motives. Having evaded capture for almost a decade, bin Laden was located and killed by members of the U.S. military in May 2011.

The destruction of the Twin Towers and other properties caused serious damage to the economy of Lower Manhattan and had a significant effect on global markets, closing Wall Street until September 17 and the civilian airspace in the U.S. and Canada until September 13. Many closings, evacuations, and cancellations followed, out of respect or fear of further attacks. Cleanup of the World Trade Center site was completed in May 2002, and the Pentagon was repaired within a year. Numerous memorials have been constructed, including the National September 11 Memorial & Museum in New York City, the Pentagon Memorial in Arlington County, and the Flight 93 National Memorial in a field near Shanksville.

On November 18, 2006, construction of One World Trade Center began at the World Trade Center site. The building was officially opened on November 3, 2014.

Background

Attackers

al-Qaeda

The origins of al-Qaeda can be traced to 1979 when the Soviet Union invaded Afghanistan. Osama bin Laden traveled to Afghanistan and helped organize Arab mujahideen to resist the Soviets. Under the guidance of Ayman al-Zawahiri, bin Laden became more radical. In 1996, bin Laden issued his first fatwā, calling for American soldiers to leave Saudi Arabia.

In a second fatwā in 1998, bin Laden outlined his objections to American foreign policy with respect to Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War. Bin Laden used Islamic texts to exhort Muslims to attack Americans until the stated grievances are reversed. According to bin Laden, Muslim legal scholars, "have throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries."

Osama bin Laden

Bin Laden, who orchestrated the attacks, initially denied but later admitted involvement. Al Jazeera broadcast a statement by bin Laden on September 16, 2001, stating, "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation." In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the tape, bin Laden is seen talking to Khaled al-Harbi and admits foreknowledge of the attacks. On December 27, 2001, a second bin Laden video was released. In the video, he said, "It has become clear that the West in general and America in particular have an unspeakable hatred for Islam....It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people...We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim umma (nation) has occurred", but he stopped short of admitting responsibility for the attacks. The transcript references several times to the United States specifically targeting Muslims.

Shortly before the U.S. presidential election in 2004, in a taped statement, bin Laden publicly acknowledged al-Qaeda's involvement in the attacks on the U.S. and admitted his direct link to the attacks. He said that the attacks were carried out because, "we are free ... and want to regain freedom for our nation. As you undermine our security we undermine yours." Bin Laden said he had personally directed his followers to attack the World Trade Center. Another video obtained by Al Jazeera in September 2006 shows bin Laden with Ramzi bin al-Shibh, as well as two hijackers, Hamza al-Ghamdi and Wail al-Shehri, as they make preparations for the attacks. The U.S. never formally indicted bin Laden for the 9/11 attacks but he was on the FBI's Most Wanted List for the bombings of the U.S. Embassies in Dar es Salaam, Tanzania, and Nairobi, Kenya. After a nearly 10-year manhunt, bin Laden was killed by American special forces in a compound in Abbottabad, Pakistan on May 2, 2011.

Khalid Sheikh Mohammed

The journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that, in April 2002, Khalid Sheikh Mohammed admitted his involvement, along with Ramzi bin al-Shibh. The 9/11 Commission Report determined that the animosity towards the United States felt by Mohammed, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".

Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.

Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA, then transported to Guantanamo Bay and interrogated using methods including waterboarding. During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.

Other al-Qaeda members

In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden, Khalid Sheikh Mohammed, Ramzi bin al-Shibh, Abu Turab al-Urduni, and Mohammed Atef. To date, only peripheral figures have been tried or convicted for the attacks.

On September 26, 2005, the Spanish high court sentenced Abu Dahdah to 27 years in prison for conspiracy on the 9/11 attacks and being a member of the terrorist organization al-Qaeda. At the same time, another 17 al-Qaeda members were sentenced to penalties of between six and eleven years. On February 16, 2006, the Spanish Supreme Court reduced the Abu Dahdah penalty to 12 years because it considered that his participation in the conspiracy was not proven.

Also, in 2006, Moussaoui, who some originally suspected might have been the assigned 20th hijacker, was convicted for the lesser role of conspiracy to commit acts of terrorism and air piracy. He is serving a life sentence without parole in the United States. Mounir el-Motassadeq, an associate of the Hamburg-based hijackers, is serving 15 years in Germany for his role in helping the hijackers prepare for the attacks.

The Hamburg cell in Germany included radical Islamists who eventually came to be key operatives in the 9/11 attacks. Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, Ramzi bin al-Shibh, and Said Bahaji were all members of al-Qaeda's Hamburg cell.

Motives

Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others, calling for the killing of Americans, are seen by investigators as evidence of his motivation. In bin Laden's November 2002 "Letter to America", he explicitly stated that al-Qaeda's motives for their attacks include

• U.S. support of Israel
• Support for the "attacks against Muslims" in Somalia
• Support of Russian "atrocities against Muslims" in Chechnya
• Pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
• Support of Indian "oppression against Muslims" in Kashmir
• The presence of U.S. troops in Saudi Arabia
• The sanctions against Iraq

After the attacks, bin Laden and al-Zawahiri released additional video tapes and audio tapes, some of which repeated those reasons for the attacks. Two particularly important publications were bin Laden's 2002 "Letter to America", and a 2004 video tape by bin Laden.

Bin Laden interpreted Muhammad as having banned the "permanent presence of infidels in Arabia". In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, al-Qaeda wrote, "for over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbors, and turning its bases in the Peninsula into a spearhead through which to fight the neighboring Muslim peoples."

In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world. One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, al-Qaeda likely would not have been able to get people to commit to suicide missions.

In the 1998 fatwā, al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims." The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim."

Bin Laden claimed, in 2004, that the idea of destroying the towers had first occurred to him in 1982, when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War. Some analysts, including Mearsheimer and Walt, also claim that one motivation for the attacks was U.S. support of Israel. In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letter expressed bin Laden's disdain with President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.

In addition to those cited by bin Laden and al-Qaeda, analysts have suggested other motives, including western support of Islamist and non-Islamist authoritarian regimes in Saudi Arabia, Iran, Egypt, Iraq, Pakistan and northern Africa, and the presence of western troops in some of these countries. Other authors suggest the "humiliation" resulting from the Islamic world falling behind the Western world – this discrepancy rendered especially visible by the globalization trend and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support al-Qaeda.

Others have argued that 9/11 was a strategic move with the objective of provoking America into a war that would incite a pan-Islamic revolution.

Planning of the attacks

The idea for the attacks came from Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996. At that time, bin Laden and al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan. The 1998 African Embassy bombings and bin Laden's 1998 fatwā marked a turning point, as bin Laden became intent on attacking the United States.

In late 1998 or early 1999, bin Laden gave approval for Mohammed to go forward with organizing the plot. A series of meetings occurred in early 1999, involving Mohammed, bin Laden, and his deputy Mohammed Atef. Atef provided operational support for the plot, including target selections and helping arrange travel for the hijackers. Bin Laden overruled Mohammed, rejecting some potential targets such as the U.S. Bank Tower in Los Angeles because, "there was not enough time to prepare for such an operation".

Bin Laden provided leadership and financial support for the plot, and was involved in selecting participants. Bin Laden initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In spring 2000, Hazmi and Mihdhar took flying lessons in San Diego, California, but both spoke little English, did poorly with flying lessons, and eventually served as secondary – or "muscle" – hijackers.

In late 1999, a group of men from Hamburg, Germany arrived in Afghanistan, including Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh. Bin Laden selected these men because they were educated, could speak English, and had experience living in the West. New recruits were routinely screened for special skills and al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.

Hanjour arrived in San Diego on December 8, 2000, joining Hazmi. They soon left for Arizona, where Hanjour took refresher training. Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000. Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa and remain as an illegal immigrant. Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed. The three Hamburg cell members all took pilot training in South Florida.

In spring 2001, the secondary hijackers began arriving in the United States. In July 2001, Atta met with bin al-Shibh in Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.

Attacks

Early on the morning of September 11, 2001, 19 hijackers took control of four commercial airliners (two Boeing 757 and two Boeing 767) en route to California (three headed to LAX in Los Angeles, and one to San Francisco) after takeoffs from Boston, Massachusetts; Newark, New Jersey; and Washington, D.C. Large planes with long flights were selected for hijacking because they would be heavily fueled.

The four flights were:

• American Airlines Flight 11: a Boeing 767 aircraft, departed Boston's Logan Airport at 7:59 a.m. en route to Los Angeles with a crew of 11 and 76 passengers, not including five hijackers. The hijackers flew the plane into the North Tower of the World Trade Center at 8:46 a.m.
• United Airlines Flight 175: a Boeing 767 aircraft, departed Logan Airport at 8:14 a.m. en route to Los Angeles with a crew of nine and 51 passengers, not including five hijackers. The hijackers flew the plane into the South Tower of the World Trade Center at 9:03 a.m.
• American Airlines Flight 77: a Boeing 757 aircraft, departed Washington Dulles International Airport in Virginia at 8:20 a.m. en route to Los Angeles with a crew of six and 53 passengers, not including five hijackers. The hijackers flew the plane into the Pentagon at 9:37 a.m.
• United Airlines Flight 93: a Boeing 757 aircraft, departed Newark International Airport at 8:42 a.m. en route to San Francisco, with a crew of seven and 33 passengers, not including four hijackers. As passengers attempted to subdue the hijackers, the aircraft crashed into the ground near Shanksville, Pennsylvania, at 10:03 a.m.

Media coverage was intense during the attacks and aftermath, beginning moments after the first crash into the World Trade Center.

Events

At 8:46 a.m., five hijackers crashed American Airlines Flight 11 into the northern facade of the World Trade Center's North Tower (1 WTC), and at 9:03 a.m., another five hijackers crashed United Airlines Flight 175 into the southern facade of the South Tower (2 WTC). Five hijackers flew American Airlines Flight 77 into the Pentagon at 9:37 a.m.

A fourth flight, United Airlines Flight 93, under the control of four hijackers, crashed near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. after the passengers fought the hijackers. Flight 93's target is believed to have been either the Capitol or the White House. Flight 93's cockpit voice recorder revealed crew and passengers tried to seize control of the plane from the hijackers after learning through phone calls that Flights 11, 77, and 175 had been crashed into buildings that morning. Once it became evident to the hijackers that the passengers might regain control of the plane, the hijackers rolled the plane and intentionally crashed it.

Some passengers and crew members who called from the aircraft using the cabin airphone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed. Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers. In their final report, the 9/11 Commission found the hijackers had recently purchased multi-function hand tools and assorted knives and blades. A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake.

Three buildings in the World Trade Center complex collapsed due to fire-induced structural failure. The South Tower collapsed at 9:59 a.m. after burning for 56 minutes in a fire caused by the impact of United Airlines Flight 175 and the explosion of its fuel. The North Tower collapsed at 10:28 a.m. after burning for 102 minutes. When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging it and starting fires. These fires burned for hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m. The Pentagon sustained major damage.

At 9:40 a.m., the FAA grounded all aircraft within the continental U.S., and aircraft already in flight were told to land immediately. All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and all international flights were banned from landing on U.S. soil for three days. The attacks created widespread confusion among news organizations and air traffic controllers. Among the unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent said a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C. Another jet—Delta Air Lines Flight 1989—was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.

In a September 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House. During the planning stage of the attacks, Mohamed Atta, the hijacker and pilot of Flight 11, thought the White House might be too tough a target and sought an assessment from Hani Hanjour, who would later hijack and pilot Flight 77. Mohammed said al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control". Final decisions on targets, according to Mohammed, were left in the hands of the pilots.

Casualties

The attacks resulted in the deaths of 2,996 people, including the 19 hijackers. The 2,977 victims included 246 on the four planes (from which there were no survivors), 2,606 in the World Trade Center and in the surrounding area, and 125 at the Pentagon. Nearly all of those who perished were civilians with the exceptions of 72 law enforcement officers, 343 firefighters, and 55 military personnel who died in the attacks. The attacks of September 11, 2001, marked it the worst terrorist attack in world history and the deadliest foreign act of destruction to life and property on American soil since the Japanese surprise attack on Pearl Harbor on December 7, 1941.

In Arlington County, 125 Pentagon workers lost their lives when Flight 77 crashed into the western side of the building. Of these, 70 were civilians and 55 were military personnel, many of them who worked for the United States Army or the United States Navy. The Army lost 47 civilian employees, six civilian contractors, and 22 soldiers, while the Navy lost six civilian employees, three civilian contractors, and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees were also among the dead in the attack, as well as an Office of the Secretary of Defense (OSD) contractor. Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.

In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. In the North Tower, 1,355 people at or above the point of impact were trapped and died of smoke inhalation, fell or jumped from the tower to escape the smoke and flames, or were killed in the building's eventual collapse. The destruction of all three staircases in the tower when Flight 11 hit made it impossible for anyone above the impact zone to escape. 107 people below the point of impact died as well.

In the South Tower, one stairwell, Stairwell A, was left intact after Flight 175 hit, allowing 14 people located on the floors of impact (including one man who saw the plane coming at him) and four more from the floors above to escape. 911 operators who received calls from individuals inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own. 630 people died in that tower, fewer than half the number killed in the North Tower. Casualties in the South Tower were significantly reduced by some occupants deciding to start evacuating as soon as the North Tower was struck.

At least 200 people fell or jumped to their deaths from the burning towers (as exemplified in the photograph The Falling Man), landing on the streets and rooftops of adjacent buildings hundreds of feet below. Some occupants of each tower above the point of impact made their way toward the roof in hope of helicopter rescue, but the roof access doors were locked. No plan existed for helicopter rescues, and the combination of roof equipment and thick smoke and intense heat prevented helicopters from approaching. A total of 414 emergency workers died as they tried to rescue people and fight fires. The New York City Fire Department (FDNY) lost 341 firefighters and two paramedics. The New York City Police Department (NYPD) lost 23 officers. The Port Authority Police Department (PAPD) lost 37 officers. Three New York State Court Officers were killed. Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services units were killed.

Cantor Fitzgerald L.P., an investment bank on the 101st–105th floors of the North Tower, lost 658 employees, considerably more than any other employer. Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees, and 175 employees of Aon Corporation were also killed. The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m. The vast majority of people below the impact zone safely evacuated the buildings.

After New York, New Jersey lost the most state citizens, with the city of Hoboken having the most citizens that died in the attacks. More than 90 countries lost citizens in the September 11 attacks.

Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed. The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead". Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building. In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where seventy-two more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims. The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner’s facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum. In July 2011, a team of scientists at the Office of Chief Medical Examiner was still trying to identify remains, in the hope that improved technology will allow them to identify other victims. On March 20, 2015, the 1,640th victim was identified. There are still 1,113 victims who have not been identified.

Damage

Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church. The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were completely destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007. The two buildings of the World Financial Center also suffered damage.

The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned uninhabitable because of toxic conditions inside the office tower, and was deconstructed. The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage in the attacks, and is being rebuilt. Other neighboring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored. World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored. Communications equipment on top of the North Tower was also destroyed, but media stations were quickly able to reroute the signals and resume their broadcasts.

The Pentagon was severely damaged by the impact of American Airlines Flight 77 and ensuing fires, causing one section of the building to collapse. As the airplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building. The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second. Debris from the tail section penetrated furthest into the building, breaking through 310 feet (94 m) of the 3 outermost of the building's 5 rings.

Rescue efforts

The New York City Fire Department deployed 200 units (half of the department) to the World Trade Center. Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians. The New York City Police Department sent Emergency Service Units and other police personnel, and deployed its aviation unit. Once on the scene, the FDNY, NYPD, and PAPD did not coordinate efforts and performed redundant searches for civilians. As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for its personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed. With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.

After the first tower collapsed, FDNY commanders issued evacuation warnings; however, due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene. Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.

Aftermath

Immediate response

At 8:32 a.m., Federal Aviation Administration (FAA) officials were notified Flight 11 had been hijacked and they in turn notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had 9 minutes' notice that Flight 11 had been hijacked, and no notice about any of the other flights before they crashed. After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m. At 10:20 a.m. Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. However, these instructions were not relayed in time for the fighters to take action. Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.

For the first time in U.S. history, SCATANA was invoked, closing all airspace and immediately grounding all non-emergency civilian aircraft in the United States, Canada, and several other countries, thus stranding tens of thousands of passengers across the world. The Federal Aviation Administration closed American airspace to all international flights, causing about five hundred flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.

The 9/11 attacks had immediate effects upon the American people. Police and rescue workers from around the country took leaves of absence, traveling to New York City to help recover bodies from the twisted remnants of the Twin Towers. Blood donations across the U.S. surged in the weeks after 9/11.

The deaths of adults who were killed in the attacks or died in rescue operations resulted in over 3,000 children losing a parent. Subsequent studies documented children's reactions to these actual losses and to feared losses of life, the protective environment in the aftermath of the attacks, and effects on surviving caregivers. As the motive to start War on Terror, 9/11 has lead to a loss of life that is massively greater than its own count of fatalities.

Domestic reactions

Following the attacks, President Bush's approval rating soared to 90%. On September 20, 2001, he addressed the nation and a joint session of the United States Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role won him high praise in New York and nationally.

Many relief funds were immediately set up to assist victims of the attacks, with the task of providing financial assistance to the survivors of the attacks and to the families of victims. By the deadline for victim's compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.

Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks. However, Congress was not told that the United States had been under a continuity of government status until February 2002.

In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes. Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade the privacy of citizens and that it eliminates judicial oversight of law enforcement and domestic intelligence. In an effort to effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized since it permitted the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant". In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.

Hate crimes

Shortly after the attacks, President Bush made a public appearance at Washington's largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect." However, numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks. Sikhs were also targeted because Sikh males usually wear turbans, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on people, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, was fatally shot on September 15, 2001, in Mesa, Arizona.

According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin. A report by the South Asian American advocacy group known as South Asian Americans Leading Together, documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.

Muslim American response

Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families". These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.

International reactions

The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity. Leaders in most Middle Eastern countries, and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that, "the American cowboys are reaping the fruit of their crimes against humanity". While the government of Saudi Arabia officially condemned the attacks, privately many Saudis favored bin Laden's cause. As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.

United Nations Security Council Resolution 1368 condemned the attacks, and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter. Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of al-Qaeda ties. Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.

British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States. A few days later, Blair flew to Washington to affirm British solidarity with the United States. In a speech to Congress, nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain." Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).

Tens of thousands of people attempted to flee Afghanistan following the attacks, fearing a response by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001. Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of al-Qaeda. Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected al-Qaeda members.

The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.

Military operations

At 2:40 p.m. in the afternoon of September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether good enough hit S.H." (Saddam Hussein) "at same time. Not only UBL" (Osama bin Laden). Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not." In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to 9/11.

The NATO council declared the attacks on the United States were an attack on all NATO nations which satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind. Australian Prime Minister John Howard who was in Washington D.C. during the attacks invoked Article IV of the ANZUS treaty. The Bush administration announced a War on Terror, with the stated goals of bringing bin Laden and al-Qaeda to justice and preventing the emergence of other terrorist networks. These goals would be accomplished by imposing economic and military sanctions against states harboring terrorists, and increasing global surveillance and intelligence sharing.

On September 14, 2001, the U.S. Congress passed the Authorization for Use of Military Force Against Terrorists. Still in effect, it grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11th attacks, or who harbored said persons or groups.

On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces. The overthrow of the Taliban rule of Afghanistan by a U.S.-led coalition was the second-biggest operation of the U.S. Global War on Terrorism outside the United States, and the largest directly connected to terrorism. Conflict in Afghanistan between the Taliban insurgency and the International Security Assistance Force is ongoing. The Philippines and Indonesia, among other nations with their own internal conflicts with Islamic terrorism, also increased their military readiness.

Effects

Health issues

Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants, including known carcinogens, were spread across Lower Manhattan due to the collapse of the Twin Towers. Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at ground zero. The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002.

Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown. Several deaths have been linked to the toxic dust, and the victims' names were included in the World Trade Center memorial. Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust. There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development. A notable children's environmental health center is currently analyzing the children whose mothers were pregnant during the WTC collapse, and were living or working nearby. A study of rescue workers released in April 2010 found that all those studied had impaired lung functions, and that 30–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.

Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city. Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the aftermath of the attacks, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe. Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.

The United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act on December 22, 2010, and President Barack Obama signed the act into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks. The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.

According to a new study, pregnant women living near the World Trade Center during the 9/11 terror attacks experienced higher-than-normal negative birth outcomes. The study by Princeton University's Woodrow Wilson School of Public and International Affairs found that these mothers were more likely to give birth prematurely and deliver babies with low birth weights. Their babies were also more likely to be admitted to neonatal intensive care units after birth (especially baby boys), according to the study led by the Wilson School's Janet Currie and Hannes Schwandt.

Economic

The attacks had a significant economic impact on United States and world markets. The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline. By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.

In New York City, about 430,000 job-months and $2.8 billion dollars in wages were lost in the three months after the attacks. The economic effects were mainly on the economy's export sectors. The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs. Also hurt were small businesses in Lower Manhattan near the World Trade Center, 18,000 of which were destroyed or displaced, resulting in lost jobs and their consequent wages. Assistance was provided by Small Business Administration loans, federal government Community Development Block Grants, and Economic Injury Disaster Loans. Some 31,900,000 square feet (2,960,000 m) of Lower Manhattan office space was damaged or destroyed. Many wondered whether these jobs would return, and if the damaged tax base would recover. Studies of the economic effects of 9/11 show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.

North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.

The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq, as well as additional homeland security spending, totaling at least $5 trillion.

Cultural

The impact of 9/11 extends beyond geopolitics into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of flags. The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative or thematic elements in film, television, music and literature. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns. 9/11 conspiracy theories have become social phenomena, despite negligible support for such views from expert scientists, engineers, and historians. As the motive to start War on Terror, 9/11 has lead to a loss of life that is massively greater than its own count of fatalities. 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lost it entirely, because they couldn't reconcile it with their view of religion.

The culture of America succeeding the attacks is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks that includes most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.

Government policies toward terrorism

As a result of the attacks, many governments across the world passed legislation to combat terrorism. In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement. Canada passed the Canadian Anti-Terrorism Act, that nation's first anti-terrorism law. The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005. New Zealand enacted the Terrorism Suppression Act 2002.

In the United States, the Department of Homeland Security was created by the Homeland Security Act to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge, to monitor telephone communications, e-mail, and Internet use by terror suspects, and to prosecute suspected terrorists without time restrictions. The Federal Aviation Administration ordered that airplane cockpits be reinforced to prevent terrorists gaining control of planes, and assigned sky marshals to flights. Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.

Investigations

FBI

Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in the history of the United States. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads. The FBI concluded that there was "clear and irrefutable" evidence linking al-Qaeda and bin Laden to the attacks.

The FBI was quickly able to identify the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments and al-Qaeda connections. "It had all these Arab-language (sic) papers that amounted to the Rosetta stone of the investigation", said one FBI agent. Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers. On September 27, 2001, they released photos of all 19 hijackers, along with information about possible nationalities and aliases. Fifteen of the men were from Saudi Arabia, two from the United Arab Emirates, one (Atta) from Egypt, and one from Lebanon.

By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden. Two of the hijackers were known to have travelled with a bin Laden associate to Malaysia in 2000 and hijacker Mohammed Atta had previously gone to Afghanistan. He and others were part of a terrorist cell in Hamburg. One of the members of the Hamburg cell was discovered to have been in communication with Khalid Sheik Mohammed who was identified as a member of al-Qaeda.

Authorities in the United States and Britain also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicate that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation." These conversations did not specifically mention the World Trade Center or Pentagon, or other specifics.

CIA

The Inspector General of the Central Intelligence Agency (CIA) conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism. He criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI. In May 2007, senators from both major U.S. political parties drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11."

Congressional inquiry

In February 2002 the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community. Their 832 page report released in December 2002 detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, in order to disrupt the plots. The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources. Nevertheless, the Bush administration demanded 28 related pages remain classified. In December 2002 the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States." September 11th victim families were frustrated by the unanswered questions and redacted material from the Congressional inquiry and demanded an independent commission. September 11th victim families, members of congress and the Saudi Arabian government are still seeking release of the documents.

9/11 Commission

The National Commission on Terrorist Attacks Upon the United States (9/11 Commission), chaired by Thomas Kean and Lee H. Hamilton, was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks. On July 22, 2004, the Commission issued the 9/11 Commission Report. The report detailed the events of 9/11, found the attacks were carried out by members of al-Qaeda, and examined how security and intelligence agencies were inadequately coordinated to prevent the attacks. Formed from an independent bipartisan group of mostly former Senators, Representatives, and Governors, the commissioners explained, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management". The Commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.

Collapse of the World Trade Center

The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction. The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.

NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that, had this not occurred, the towers likely would have remained standing. A 2007 study of the north tower's collapse published by researchers of Purdue University determined that, since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.

The director of the original investigation stated that, "the towers really did amazingly well. The terrorist aircraft didn’t bring the buildings down; it was the fire which followed. It was proven that you could take out two thirds of the columns in a tower and the building would still stand." The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward. With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones. NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".

Rebuilding

On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again."

The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks. The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing. The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting 1 WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere. 1 WTC finished construction and opened on November 3, 2014.

On the World Trade Center site, three more office towers are expected to be built one block east of where the original towers stood. Construction has begun on all three of these towers; they are expected to be completed after One World Trade Center.

Memorials

In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, walls of subway stations. Everything reminded me of a huge funeral, people quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other.”

One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers. In New York, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site. The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.

The Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008. It consists of a landscaped park with 184 benches facing the Pentagon. When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.

In Shanksville, a permanent Flight 93 National Memorial is planned to include a sculpted grove of trees forming a circle around the crash site, bisected by the plane's path, while wind chimes will bear the names of the victims. A temporary memorial is located 500 yards (457 m) from the crash site. New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon. It was installed outside the firehouse on August 25, 2008. Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families, and by many other organizations and private figures.

On every anniversary, in New York City, the names of the victims who died there are read out against a background of somber music. The President of the United States attends a memorial service at the Pentagon, and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the President's spouse.

See also

Template:Misplaced Pages books

• Bojinka plot – plot by Ramzi Yousef and Khalid Shaikh Mohammed, foiled in 1995, to attack multiple airliners and crash a plane into the CIA headquarters
• Federal Express Flight 705 – 1994 cockpit attack
• Southwest Airlines Flight 1763 – August 2000 cockpit attack

• 2000s
• New York City
• United States

Notes

1. 9/11 is pronounced "nine eleven". The slash is not part of the pronunciation. The name is frequently used in British English as well as in American English, although the dating conventions differ.

References

Citations

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2. Inside 9/11: Zero Hour, National Geographic Channel documentary, 2005.
3. ^ Matthew J. Morgan (August 4, 2009). The Impact of 9/11 on Politics and War: The Day that Changed Everything?. Palgrave Macmillan. p. 222. ISBN 0-230-60763-2.
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8. Smith, Aaron. "One World Trade Center opens today". CNN Money. Retrieved November 4, 2014.
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10. Gunaratna (2002), pp. 23–33.
11. "Bin Laden's fatwā (1996)". PBS. Archived from the original on October 31, 2001. Retrieved May 29, 2014. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
12. ^ "Al Qaeda's Second Fatwa". PBS NewsHour. Public Broadcasting Service. Archived from the original on November 28, 2013. Retrieved May 29, 2014. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
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15. "Pakistan to Demand Taliban Give Up Bin Laden as Iran Seals Afghan Border". Fox News Channel. September 16, 2001. Retrieved September 3, 2011.
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28. 9/11 Commission Report (2004), p. 147.
29. "White House power grabs". The Washington Times. August 26, 2009. Retrieved September 3, 2011.
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34. "Substitution for Testimony of Khalid Sheikh Mohammed" (PDF). United States District Court for the Eastern District of Virginia. United States Department of Justice. 2006. p. 24. Retrieved September 3, 2011.
35. "Spain jails 18 al-Qaeda operatives". The Age. Melbourne. September 27, 2005. Retrieved September 3, 2011.
36. Naughton, Philippe (June 1, 2006). "Spanish court quashes 9/11 conviction". The Times. Retrieved September 3, 2011.
37. Summers and Swan (2011), p. 489n.
38. Youssef, Maamoun (May 24, 2006). "Bin Laden: Moussaoui Not Linked to 9/11". Washington Post. Associated Press.
39. Summers and Swan (2011), p. 542n.
40. "The Hamburg connection". BBC News. August 19, 2005.
41. "Chapter of the 9/11 Commission Report detailing the history of the Hamburg Cell". 9/11 Commission.
42. Gunarathna, pp. 61–62.
43. bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. Retrieved September 3, 2011.
44. ^ * Mearsheimer (2007), p. 67.
    • Kushner (2003), p. 389.
    • Murdico (2003), p. 64.
    • Kelley (2006), p. 207.
    • Ibrahim (2007), p. 276.
    • Berner (2007), p. 80.
45. Plotz, David (2001) What Does Osama Bin Laden Want?, Slate
46. * Plotz, David (2001) What Does Osama Bin Laden Want?, Slate
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    • Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    • "US pulls out of Saudi Arabia". BBC News. April 29, 2003. Retrieved September 3, 2011.
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47. * "Full transcript of bin Ladin's speech". aljazeera. Retrieved April 10, 2012.
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48. "Full transcript of bin Laden's "Letter to America"". The Guardian. November 24, 2002. Retrieved September 3, 2011.
49. bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider
50. Bergen (2001), p. 3.
51. ^ "1998 Al Qaeda fatwā". Fas.org. February 23, 1998. Retrieved September 3, 2011.
52. ^ Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Retrieved September 3, 2011.
53. Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 0-8129-7338-0.
54. See also the 1998 Al-Qaeda fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS NewsHour. Public Broadcasting Service. Archived from the original on November 28, 2013. Retrieved May 29, 2014. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
55. Summers and Swan (2011), pp. 211, 506n.
56. Lawrence (2005), p. 239.
57. online here)
58. In his taped broadcast from January 2010, Bin Laden said "Our attacks against you will continue as long as U.S. support for Israel continues. … The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel", in Haaretz.com
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Bibliography

• "Chapter 1.1: 'We Have Some Planes': Inside the Four Flights". 9/11 Commission Report (PDF). National Commission on Terrorist Attacks Upon the United States. 2004.
• Alavosius, Mark P.; Rodriquez, Nischal J. (2005). "Unity of Purpose/Unity of Effort: Private-Sector Preparedness in Times of Terror". Disaster Prevention & Management. 14 (5): 666. doi:10.1108/09653560510634098.
• "American Airlines Flight 77 FDR Report" (PDF). National Transportation Safety Board. January 31, 2002. Retrieved September 3, 2011.
• Averill, Jason D. (2005). Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster (PDF). National Institute of Standards and Technology (NIST). Archived from the original (PDF) on May 9, 2009. Retrieved September 2, 2011.
• Bergen, Peter L. (2001). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. Simon and Schuster. ISBN 978-0-7432-3467-2.
• Bergen, Peter (2006). The Osama Bin Laden I Know: An Oral History of Al Qaeda's Leader. Simon and Schuster. ISBN 978-0-7432-9592-5.
• Berner, Brad (2007). The World According to Al Qaeda. Peacock Books. ISBN 978-81-248-0114-7.
• Dwyer, Jim; Flynn, Kevin (2005). 102 Minutes. Times Books. ISBN 978-0-8050-7682-0.
• "Final Report on the Collapse of World Trade Center Building 7" (PDF). National Institute of Standards and Technology. November 2008. Retrieved April 11, 2012.
• "Flight Path Study – American Airlines Flight 77" (PDF). National Transportation Safety Board. February 19, 2002. Retrieved September 3, 2011.
• Fouda, Yosri; Fielding, Nick (2004). Masterminds of Terror: The Truth Behind the Most Devastating Terrorist Attack the World Has Ever Seen. Arcade Publishing. ISBN 978-1-55970-717-6.
• Goldberg, Alfred (2007). Pentagon 9/11. Washington, D.C.: Government Printing Office. ISBN 978-0-16-078328-9.
• Gunaratna, Ronan (2002). Inside Al Qaeda: global network of terror. Columbia University Press. ISBN 978-0-231-12692-2.
• Holmes, Stephen (2006). "Al Qaeda, September 11, 2001". In Diego Gambetta (ed.). Making sense of suicide missions. Oxford University Press. ISBN 978-0-19-929797-9.
• Ibrahim, Raymond; Osama Bin Laden (2007). The Al Qaeda reader. Random House Digital, Inc. ISBN 978-0-385-51655-6.
• Kelley, Christopher (2006). Executing the Constitution: putting the president back into the Constitution. SUNY Press. ISBN 978-0-7914-6727-5.
• Keppel, Gilles; Milelli, Jean-Pierre and Ghazaleh, Pascale (2008). Al Qaeda in its own words. Harvard University Press. ISBN 978-0-674-02804-3.{{cite book}}: CS1 maint: multiple names: authors list (link)
• Martin, Gus (2011). The SAGE Encyclopedia of Terrorism, Second Edition. SAGE. ISBN 978-1-4129-8017-3.
• Lawrence, Bruce; Bruce Lawrence (2005). Messages to the world: the statements of Osama Bin Laden. Verso. ISBN 978-1-84467-045-1. Retrieved May 29, 2014. {{cite book}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
• McDermott, Terry (2005). Perfect Soldiers: The 9/11 Hijackers. HarperCollins. pp. 191–192. ISBN 978-0-06-058470-2.
• "McKinsey Report". FDNY / McKinsey & Company. August 9, 2002. Retrieved September 25, 2011.
• Mearsheimer, John J. (2007). The Israel Lobby and U.S. Foreign Policy. Macmillan. ISBN 978-0-374-17772-0.
• Murdico, Suzanne (2003). Osama Bin Laden. Rosen Publishing Group. ISBN 978-0-8239-4467-5.
• "The Pentagon Building Performance Report" (PDF). American Society of Civil Engineers (ASCE). January 2003. Archived from the original (PDF) on July 21, 2011. Retrieved September 3, 2011.
• Summers, Anthony; Swan, Robbyn (2011). The Eleventh Day: The Full Story of 9/11 and Osama Bin Laden. New York: Ballantine Books. ISBN 1-4000-6659-X.
• Sunder, Shyam S. (2005). Final Report on the Collapse of the World Trade Center Towers. National Institute of Standards and Technology (NIST). Retrieved September 2, 2011.
• "World Trade Center Building Performance Study – Bankers Trust Building" (PDF). FEMA. May 2002. Retrieved July 12, 2007.
• "World Trade Center Building Performance Study – Peripheral Buildings" (PDF). FEMA. May 2002. Retrieved September 3, 2011.
• "World Trade Center Building Performance Study" (PDF). Ch. 5 WTC 7 – section 5.5.4. Federal Emergency Management Agency. 2002. Retrieved September 2, 2011.
• Wright, Lawrence (2006). The Looming Tower|The Looming Tower: Al-Qaeda and the Road to 9/11. Knopf. ISBN 978-0-375-41486-2.

Further reading

• The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. Cosimo, Inc. July 30, 2010. ISBN 978-1-61640-219-8. {{cite book}}: |work= ignored (help)
• Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.
• Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.
• Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.
• Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.
• Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.
• Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.
• Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.
• Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8.{{cite book}}: CS1 maint: multiple names: authors list (link)
• Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States (2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House-Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4.

External links

• National Commission on Terrorist Attacks Upon the United States official commission website
• National September 11th Memorial and Museum – List of victims
• September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov
• September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva
• The September 11th Sourcebooks from The National Security Archive
• September 11 Digital Archive: Saving the Histories of September 11, 2001 from the Center for History and New Media and the American Social History Project/Center for Media and Learning
• DoD: Khalid Sheikh Mohammed Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, From WikiSource

Multimedia

• Understanding 9/11 – A Television News Archive at Internet Archive
• CNN.com – Video archive, including the first and second planes.
• Remembering 9/11 – National Geographic Society
• Time.com – 'Shattered: a remarkable collection of photographs', James Nachtwey
• September 11, 2001 Screenshot Archive – Database of 230 screenshots from news sites around the world.
• Archive of newspaper front page images for 2001-09-11 at the Newseum

Links to related articles

v t e September 11 attacks Timeline Planning September 11, 2001 World Trade Center collapse 7 World Trade Center collapse Remainder of September October Post-October Victims Casualties List A–G H–N O–Z Hijacked airliners American Airlines Flight 11 United Airlines Flight 175 American Airlines Flight 77 United Airlines Flight 93 Suspected hijackings Korean Air Flight 085 Delta Air Lines Flight 1989 Crash sites World Trade Center site The Pentagon Stonycreek / Shanksville, Pennsylvania Aftermath Immediate repercussions artwork destroyed buildings destroyed closings and cancellations detentions Communication Post-9/11 economy local health airport security Reactions conspiracy theories Rudy Giuliani Unsuccessful terrorist plots Response U.S. government response U.S. military response War on terror Afghanistan North-West Pakistan Rescue and recovery effort maritime response Financial assistance Operation SUPPORT Operation Yellow Ribbon Memorials and services 9/11 Memorial and Museum Flight 93 National Memorial Pentagon Memorial Victims of Terrorist Attack on the Pentagon Memorial World Trade Center Health Program Killing of Osama bin Laden Killing of Ayman al-Zawahiri Perpetrators Responsibility Al-Qaeda Osama bin Laden Alleged Saudi role Motives Hijackers 20th hijacker Hamburg cell Trials Inquiries U.S. congressional inquiry the 28 pages September 11 intelligence before the attacks August 2001 CIA warning Phoenix Memo 9/11 Commission Commission Report criticism NIST investigation PENTTBOM ThinThread Cultural effects Cultural references songs comics books Cartoonists Remember 9/11 Entertainment affected Humor Lost artworks Clear Channel memorandum Digital Archive Miscellaneous Edna Cintrón War games Patriot Day The Falling Man Impending Death Dust Lady Raising the Flag at Ground Zero View from Williamsburg, Brooklyn, on Manhattan, 9/11 Blind Tourist Guy hoax Iraq War Twin Towers II Disappearance of Sneha Anne Philip Disappearance of Michele Anne Harris Murder of Balbir Singh Sodhi Killing of Henryk Siwiak Mark Anthony Stroman Larme Price Rudi Dekkers Alicia Esteve Head Jersey Girls Emma E. Booker Elementary School Media documentation Category WikiProject v t e World Trade Center First WTC (1973–2001) Construction Towers 1 2 3 4 5 6 7 Austin J. Tobin Plaza Windows on the World Mall The Bathtub Tenants Art 1993 World Trade Center Bombing Memorial Bent Propeller Ideogram Sky Gate, New York The Sphere The World Trade Center Tapestry World Trade Center Plaza Sculpture Major events February 26, 1993 bombing January 14, 1998 robbery September 11, 2001 attacks Collapse Timeline Victims Aftermath Rescue and recovery effort NIST report on collapse Deutsche Bank Building St. Nicholas Greek Orthodox Church Second WTC (2001–present) Site, towers, and structures One Construction Tenants 2 3 4 5 7 Perelman Performing Arts Center Vehicular Security Center Liberty Park St. Nicholas Greek Orthodox Church Westfield Mall Artwork ONE: Union of the Senses The Sphere Rapid transit PATH stations Transportation Hub New York City Subway stations Chambers Street–WTC/Park Place/Cortlandt Street (2, ​3​, A, ​C, ​E​, ​N, ​R, and ​W trains) WTC Cortlandt (1 train) Fulton Street (2, ​3​, 4, ​5​, A, ​C​, J, and ​Z trains) Fulton Center Corbin Building Dey Street Passageway 9/11 memorials 9/11 Tribute Museum National September 11 Memorial & Museum Competition Memory Foundations Tribute in Light America's Response Monument Empty Sky To the Struggle Against World Terrorism Postcards memorial The Rising memorial Relics from the original WTC The Sphere Cross Survivors' Staircase People Minoru Yamasaki David Rockefeller Nelson Rockefeller Emery Roth & Sons Austin J. Tobin Christopher O. Ward Larry Silverstein David Childs Michael Arad THINK Team Daniel Libeskind Leslie E. Robertson Welles Crowther Other Port Authority of New York and New Jersey Silverstein Properties Project Rebirth Take Back The Memorial WTC in popular culture Music 9/11-related media Silver dollar 10048 ZIP code Former: IFC Twin Towers 2 Brookfield Place 200 Liberty Street 225 Liberty Street 200 Vesey Street 250 Vesey Street Winter Garden Atrium One North End Avenue Other nearby structures 90 Church Street 90 West Street 200 West Street Barclay–Vesey Building Park51 West Street pedestrian bridges v t e War on terror September 11 attacks War in Afghanistan (2001-2021) (Withdrawal) Iraq War (2003–2011) (Withdrawal) Symbolism of terrorism Participants Operational ISAF Operation Enduring Freedom participants Afghanistan Northern Alliance Iraq (Iraqi Armed Forces) NATO Pakistan United Kingdom United States European Union Philippines Ethiopia Targets Individuals Osama bin Laden Hamza bin Laden Anwar al-Awlaki Sirajuddin Haqqani Jalaluddin Haqqani Anas Haqqani Khalil Haqqani Hafiz Saeed Mahmoud Mohamed Ahmed Bahaziq Abu Bakr al-Baghdadi Factions al-Qaeda al-Qaeda in the Arabian Peninsula Abu Sayyaf Al-Shabaab Boko Haram Harkat-ul-Jihad al-Islami Hizbul Mujahideen Islamic Courts Union Jaish-e-Mohammed Jemaah Islamiyah Lashkar-e-Taiba Taliban Islamic Movement of Uzbekistan Islamic State Conflicts Operation Enduring Freedom War in Afghanistan OEF – Philippines Georgia Train and Equip Program Georgia Sustainment and Stability OEF – Horn of Africa OEF – Trans Sahara Drone strikes in Pakistan Other Operation Active Endeavour Insurgency in the Maghreb (2002–present) Insurgency in the North Caucasus Moro conflict in the Philippines Iraq War Iraqi insurgency Operation Linda Nchi Terrorism in Saudi Arabia Insurgency in Khyber Pakhtunkhwa War in Somalia (2006–2009) 2007 Lebanon conflict al-Qaeda insurgency in Yemen Policies Patriot Act (2001) Torture Memos (2002) Military Commissions Act of 2006 Military Commissions Act of 2009 President's Surveillance Program Protect America Act of 2007 Terrorist Surveillance Program Related Abu Ghraib torture and prisoner abuse Axis of evil Bush Doctrine Clash of Civilizations Cold War Combatant Status Review Tribunal Criticism of the war on terror CIA black sites Killing of Ayman al-Zawahiri Killing of Osama bin Laden Enhanced interrogation techniques Extrajudicial prisoners Extraordinary rendition Guantanamo Bay detention camp Iranian Revolution Islamic terrorism Islamism North Korea and weapons of mass destruction Operation Noble Eagle Operation Eagle Assist Situation Room photograph State Sponsors of Terrorism Targeted killing Targeted Killing in International Law Targeted Killings: Law and Morality in an Asymmetrical World Unitary executive theory Unlawful combatant CAGE Category Commons v t e Al-Qaeda Leadership Saif al-Adel Abd al-Rahman al-Maghribi Sa'ad bin Atef al-Awlaki Ahmad Umar Iyad Ag Ghaly Ezedin Abdel Aziz Khalil Abu Ubaidah Youssef al-Annabi Ali Sayyid Muhamed Mustafa al-Bakri Ibrahim al-Banna Ibrahim al Qosi Abu Walid al-Masri Mohammed Showqi Al-Islambouli Abdukadir Mohamed Abdukadir Fuad Qalaf Jehad Mostafa Abu Humam al-Shami Sami al-Oraydi Former leadership Killed Osama bin Laden (killing) Ayman al-Zawahiri (killing) Mohammed Atef Qaed Salim Sinan al-Harethi Mustafa Mohamed Fadhil Haitham al-Yemeni Abu Hamza Rabia Muhsin Musa Matwalli Atwah Abu Musab al-Zarqawi Omar al-Faruq Haitham al-Badri Abu Yaqub al-Masri Abu Talha al-Sudani Abu Laith al-Libi Abu Sulayman Al-Jazairi Midhat Mursi Mohamed Moumou Khalid Habib Abu Ghadiya Abu Zubair al-Masri Rashid Rauf Mohammad Hasan Khalil al-Hakim Fahid Mohammed Ally Msalam Sheikh Ahmed Salim Swedan Saad bin Laden Saleh Ali Saleh Nabhan Abdullah Said al Libi Saleh al-Somali Saeed al-Masri Hamza al-Jawfi Ahmed Mohammed Hamed Ali Mohamed Abul-Khair Sheikh Fateh Huthaifa al-Batawi Ilyas Kashmiri Fazul Abdullah Mohammed Atiyah Abd al-Rahman Anwar al-Awlaki Samir Khan Tariq al-Dahab Muhammad Sa'id Ali Hasan Fahd al-Quso Abu Yahya al-Libi Hassan Ghul Abu-Zaid al Kuwaiti Said Ali al-Shihri Farman Ali Shinwari Abdelhamid Abou Zeid Ibrahim Haji Jama Mee'aad Abu Mansoor Al-Amriki Said Bahaji Abu Khalid al-Suri Omar Ould Hamaha Ahmed Abdi Godane Abu Yusuf Al-Turki Adnan Gulshair el Shukrijumah Adam Yahiye Gadahn Harith bin Ghazi al-Nadhari Othman Ahmad Othman al-Ghamdi Ibrahim Sulayman Muhammad al-Rubaysh Nasser bin Ali al-Ansi Nasir al-Wuhayshi Muhsin al-Fadhli Abu Khalil al-Madani Matiur Rehman Abu Firas al-Suri Ahmed Refai Taha Mokhtar Belmokhtar Abu Khayr al-Masri Ibrahim al-Asiri Hamza bin Laden Sari Shihab Asim Umar Qasim al-Raymi Abdelmalek Droukdel Khalid al-Aruri Abdullah Ahmed Abdullah Abu Muhsin al-Masri Captured Mamdouh Mahmud Salim Wadih el-Hage Khalid al-Fawwaz Abd al-Rahim al-Nashiri Khalid Sheikh Mohammed Walid bin Attash Riduan Isamuddin Ali al-Bahlul Ahmed Ghailani Abu Faraj al-Libbi Mustafa Setmariam Nasar Abdul Hadi al Iraqi Muhammad Jafar Jamal al-Kahtani Mohamed Atiq Awayd Al Harbi Younis al-Mauritani Sulaiman Abu Ghaith Abu Anas al-Libi Muhanad Mahmoud Al Farekh Mukhtar Robow Amin al-Haq Other Abu Ubaidah al-Banshiri (died) Abu Ubaidah al-Masri (died) Mahfouz Ould al-Walid (left) Abu Bakr al-Baghdadi (expelled) Abu Mohammad al-Julani (left) Abu Maria al-Qahtani (left) Ahmad Salama Mabruk (left) Abu Omar al-Turkistani (left) Abu Sulayman al-Muhajir (left) Khalid Batarfi (died) Timeline of attacks 1998 United States embassy bombings 2000 USS Cole bombing 2001 September 11 attacks 2002 Bali bombings 2004 Madrid train bombings 2005 London bombings 2007 Algiers bombings 2008 Islamabad Danish embassy bombing 2008 Islamabad Marriott Hotel bombing 2013 In Amenas hostage crisis 2013 Westgate shopping mall attack 2015 Charlie Hebdo shooting 2015 Garissa University College attack 2015 Bamako hotel attack 2016 Ouagadougou attacks 2016 Grand-Bassam shootings 2016 Bamako attack 2019 Naval Air Station Pensacola shooting Wars Soviet–Afghan War Afghan Civil War (1989–1992) Afghan Civil War (1992–1996) First Chechen War Afghan Civil War (1996–2001) Second Chechen War War in Afghanistan (2001–2021) Iraq War Somali Civil War War in North-West Pakistan (drone strikes) Insurgency in the Maghreb (2002–present) Syrian civil war Yemeni civil war (2014–present) Al-Qaeda insurgency in Yemen Houthi insurgency Affiliates Al-Shabaab (Somalia) Al-Qaeda in the Arabian Peninsula (Yemen) Al-Qaeda in the Islamic Maghreb (North Africa) Egyptian Islamic Jihad (Egypt) Al-Qaeda in the Indian subcontinent (Indian subcontinent) Jama'at Nasr al-Islam wal Muslimin (Mali) Hurras al-Din (Syria) Charity organizations Benevolence International Foundation Al-Haramain Foundation Media Al Qaeda Handbook Al Neda As-Sahab Al-Andalus Media Al-Kataib Media Foundation Radio al-Andalus Shahada News Agency Az-Zallaqa Foundation Fatawā of Osama bin Laden Inspire Al-Khansaa Kuala Lumpur al-Qaeda Summit Management of Savagery Voice of Jihad Qaedat al-Jihad Global Islamic Media Front Video and audio Videos and audio recordings of Osama bin Laden Videos and audio recordings of Ayman al-Zawahiri USS Cole bombing Related Safe houses Saddam–al-Qaeda conspiracy theory Timeline Category:Al-Qaeda v t e Aviation accidents and incidents in 2001 (2001) Jan 23 Yemenia Flight 448Jan 25 RUTACA Airlines Flight 225Jan 27 Omsk An-70 crashJan 27 Oklahoma State basketball team crashJan 31 Japan Airlines mid-air incidentFeb 7 Iberia Flight 1456Feb 27 Loganair Flight 670AMar 3 Thai Airways International Flight 114Mar 15 Vnukovo Airlines Flight 2806Mar 24 Air Caraïbes Flight 1501Mar 29 Avjet Gulfstream III crashApr 1 Hainan Island incidentApr 20 Peru shootdownMay 17 Faraz Qeshm Airlines Yak-40 crashJul 4 Vladivostok Air Flight 352Aug 24 Air Transat Flight 236Aug 25 Marsh Harbour Cessna 402 crashAug 29 Binter Mediterráneo Flight 8261Sep 11 American Airlines Flight 11Sep 11 United Airlines Flight 175Sep 11 American Airlines Flight 77Sep 11 United Airlines Flight 93Sep 11 Delta Air Lines Flight 1989Sep 11 Korean Air Flight 085Sep 15 TAM Airlines Flight 9755Sep 17 Grozny Mi-8 crashSep 21 Aeroflot Flight 521Oct 4 Siberia Airlines Flight 1812Oct 8 2001 Linate Airport runway collisionOct 10 Flightline Flight 101Nov 12 American Airlines Flight 587Nov 12 Fishtail Air Eurocopter AS350 crashNov 19 IRS Aero Flight 9601/02Nov 24 Crossair Flight 3597Dec 2 AFRF Flight 9064Dec 22 American Airlines Flight 63 2000   ◄    ►   2002 v t e History of the United States Timeline Outline Events Pre-Colonial Prehistoric Pre-Columbian Era Colonial Exploration of North America European colonization Native American epidemics Settlement of Jamestown Thirteen Colonies Atlantic slave trade King William's War Queen Anne's War Dummer's War First Great Awakening War of Jenkins' Ear King George's War Prelude to Revolution American Enlightenment French and Indian War Proclamation of 1763 Sugar Act Stamp Act Congress Sons of Liberty Boston Massacre Boston Tea Party Intolerable Acts First Continental Congress Continental Association 1776–1789 American Revolution War Second Continental Congress Lee Resolution Declaration of Independence Treaty of Paris Confederation period Articles of Confederation and Perpetual Union Pennsylvania Mutiny Shays' Rebellion Northwest Ordinance Drafting and ratification of the Constitution 1789–1815 Bill of Rights Federalist Era Whiskey Rebellion Quasi-War Jeffersonian era Louisiana Purchase War of 1812 1815–1849 Era of Good Feelings Missouri Compromise Monroe Doctrine Jacksonian era Trail of Tears Nat Turner's slave rebellion Nullification crisis Westward expansion Mexican–American War Seneca Falls Convention First Industrial Revolution Second Great Awakening 1849–1865 Antebellum Era California Gold Rush Prelude to War Compromise of 1850 Fugitive Slave Act Kansas–Nebraska Act Bleeding Kansas Dred Scott decision Election of Lincoln Secession Civil War Emancipation Proclamation Assassination of Abraham Lincoln 1865–1917 Reconstruction era Amendments First transcontinental railroad Ku Klux Klan Enforcement Acts Compromise of 1877 Second Industrial Revolution Gilded Age The Gospel of Wealth Assassination of James A. Garfield Chinese Exclusion Act Pendleton Civil Service Reform Act Haymarket affair Sherman Antitrust Act Progressive Era Spanish–American War Imperialism Assassination of William McKinley Square Deal Nadir of American race relations 1917–1945 World War I Paris Peace Conference First Red Scare Roaring Twenties Prohibition Women's suffrage Tulsa race massacre Second Klan Bath School disaster Harlem Renaissance Great Depression Wall Street Crash of 1929 Dust Bowl New Deal World War II Pearl Harbor home front Manhattan Project Atomic bombings of Hiroshima and Nagasaki 1945–1964 Strike wave of 1945–1946 Start of Cold War Truman Doctrine Early Cold War North Atlantic Treaty Korean War Ivy Mike McCarthyism Post-war boom Project Mercury Civil Rights Movement Early–mid Cold War Cuban Missile Crisis Assassination of John F. Kennedy 1964–1980 Great Society Space Race Project Gemini Apollo program Mid Cold War Détente Vietnam War Fall of Saigon Assassination of Martin Luther King Jr. Counterculture Second-wave feminism Gay liberation Stonewall riots Watergate scandal Iran hostage crisis Moral Majority 1980–1991 Reagan era Reaganomics Iran–Contra affair Crack epidemic Late Cold War Invasion of Grenada Reagan Doctrine End of the Cold War Space Shuttle program War on drugs Invasion of Panama 1991–2008 Gulf War NAFTA Los Angeles riots WTC bombing Waco siege Republican Revolution Oklahoma City bombing Columbine Bush v. Gore September 11 attacks War on terror War in Afghanistan Iraq War Hurricane Katrina Virginia Tech shooting Great Recession 2008–present Killing of Osama bin Laden Rise in mass shootings Tucson Aurora Sandy Hook Orlando Las Vegas Parkland El Paso Uvalde Black Lives Matter Obergefell v. Hodges Unite the Right rally COVID-19 pandemic recession George Floyd protests January 6 insurrection Afghanistan withdrawal Dobbs v. Jackson Women's Health Organization Support of Ukraine Indictments of Donald Trump Topics American Century Antisemitism Cultural Cinema Music Newspapers Sports Demography Immigration Economy Banking Education Higher education Flag Government Abortion Capital punishment Civil Rights Corruption The Constitution Debt ceiling Direct democracy Foreign policy Law enforcement Postal service Taxation Voting rights Journalism Merchant Marine Military Army Marine Corps Navy Air Force Space Force Coast Guard Party Systems First Second Third Fourth Fifth Sixth Religion Genocide Slavery Sexual slavery Technology and industry Agriculture Labor Lumber Medicine Railway Groups African American Asian American Chinese American Filipino American Indian American Japanese American Korean American Thai American Vietnamese American European American Albanian American English American Estonian American Finnish American Irish American Italian American Lithuanian American Polish American Serbian American Hispanic and Latino American Mexican American Jewish American Middle Eastern American Egyptian American Iranian American Iraqi American Lebanese American Palestinian American Saudi American Native Americans Cherokee Comanche Women LGBTQ Gay men Lesbians Transgender people Places Territorial evolution Admission to the Union Historical regions American frontier Manifest destiny Indian removal Regions New England The South The West Coast States Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Federal District Washington, D.C. 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