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A variety of conspiracy theories have emerged which contradict the mainstream account of the September 11, 2001 attacks. The most visible group of conspiracy theorists is the 9/11 truth movement, whose claims typically include suggestions that individuals in the government of the United States knew of the impending attacks and refused to act on that knowledge, or that the attacks were a false flag operation carried out with the intention of stirring up the passions and winning the allegiance of the American people in order to facilitate military spending, the restriction of civil liberties, and/or a program of aggressive and profitable foreign policy.

Most members of the 9/11 truth movement claim that the collapse of the World Trade Center was the result of a controlled demolition and/or that United Airlines Flight 93 was shot down. While some also contend that a commercial airliner did not crash into the Pentagon, this position is debated within the 9/11 Truth Movement, with many who believe that AA Flight 77 did crash there, but that it was allowed to crash via an effective stand down of the military.

Published reports by the National Institute of Standards and Technology do not support the controlled demolition hypothesis. U.S. officials, mainstream journalists, and independent researchers generally accepted the conclusion that Al Qaeda is solely responsible for the attacks and the resulting destruction, and civil engineers generally accept the mainstream account that the impacts of jets at high speeds in combination with subsequent fires, rather than controlled demolition, led to the collapse of the Twin Towers.

Origins and reception

Since the September 11, 2001 attacks, a number of websites, books, and films have challenged the mainstream account of the attacks. Although mainstream media report that al-Qaeda conspired to carry out the World Trade Center and Pentagon attacks, 9/11 conspiracy theories assert the mainstream accounts are inaccurate or incomplete. Many groups and individuals challenging the official account (often referred to as the "OCT," or "Official Conspiracy Theory," a term coined by Dr. David Ray Griffin) identify as part of the 9/11 Truth Movement.

Initially, 9/11 conspiracy theories received little attention in the media. In an address to the United Nations on November 10, 2001, United States President George W. Bush denounced the emergence of "outrageous conspiracy theories ... that attempt to shift the blame away from the terrorists, themselves, away from the guilty." Later, as media exposure of conspiracy theories of the events of 9/11 increased, US government agencies and the Bush Administration issued responses to the theories, including a formal analysis by the National Institute of Standards and Technology (NIST) to questions about the collapse of the World Trade Center, a revised 2006 State Department webpage to debunk the theories, and a strategy paper referred to by President Bush in an August 2006 speech, which declared that terrorism springs from "subcultures of conspiracy and misinformation," and that "terrorists recruit more effectively from populations whose information about the world is contaminated by falsehoods and corrupted by conspiracy theories. The distortions keep alive grievances and filter out facts that would challenge popular prejudices and self-serving propaganda."

A number of 9/11 opinion polls have been conducted to try and establish roughly how many people have doubts about the official account, and how prevalent the conspiracy theories are. Just prior to the fifth anniversary of the attacks, mainstream news outlets released a flurry of articles on the growth of 9/11 conspiracy theories. Time Magazine stated, "This is not a fringe phenomenon. It is a mainstream political reality." Mainstream coverage generally presents these theories as a cultural phenomenon and is often critical of their content.

The mainstream account

Immediately following the September 11, 2001 attacks, the U.S. government stated that nineteen terrorists hijacked four commercial airplanes by using knives, box cutters, pepper spray and fake explosives. At 8:46 a.m. and 9:03am, Flights 11 and 175 crashed into the Twin Towers of the World Trade Center, causing them to collapse soon after. 7 World Trade Center collapsed later in the day from fires started by debris from the collapse of the North Tower. Flight 77 crashed into the Pentagon at 9:37 a.m. and Flight 93 crashed in Pennsylvania at 10:03 a.m. after the passengers stormed the cockpit. US government intelligence sources identified the hijackers and linked them to the terrorist organisation al-Qaeda, headed by Osama Bin Laden, which later claimed sole responsibility for the attacks.

The two terms 'mainstream account' and 'official account' both refer to:

The reports from the official government investigations - the 9/11 Commission Report (which incorporated intelligence information from the earlier FBI investigation (PENTBOM) and the Joint Inquiry of 2002), and the studies into building performance carried out by the Federal Emergency Management Agency (FEMA) and the National Institute of Standards and Technology (NIST).
Investigations by non-government organisations that support the official account - such as those by the National Fire Protection Association, Purdue University and Northwestern University.,
Similar articles in magazines such as Popular Mechanics, Scientific American and Time
Similar articles in news media throughout the world, including The Times of India, the Canadian Broadcasting Corporation (CBC), the BBC, Le Monde, Deutsche Welle, the Australian Broadcasting Corporation (ABC), and The Chosun Ilbo of South Korea.

The 9/11 Commission Report disclosed prior warnings of varying detail that al-Qaeda would attack the United States. The report said that the government ignored these warnings due to a lack of communication between various law enforcement and intelligence personnel. For the lack of inter-agency communication, the report cited bureaucratic inertia and laws passed in the 1970s to prevent abuses that caused scandals during that era. The report faulted the Clinton and the Bush administration with “failure of imagination”. Most members of the Democratic party and the Republican party endorsed the commission's report.

Some criticisms of the mainstream account focus on how the government formed and operated the 9/11 Commission, and allege omissions and distortions in the 9/11 Commission Report and the NIST Report.

Main approaches

Most 9/11 conspiracy theories generally originate from dissatisfaction with the official explanation of 9/11. There are three main forms:

Incompetence - the least radical version suggests that there was a conspiracy to cover-up failures within the government. What is being covered up may be limited to inadequate counter-terrorism strategies and inappropriate responses to warnings received by the intelligence and security services, or it may go further to suggest that the military response at the time of attacks was also incompetent.
LIHOP ("let it happen on purpose") - this version suggests that key individuals within the government had at least some foreknowledge of the attacks and deliberately ignored them or even actively weakened America's defenses to ensure the hijacked flights were not intercepted.
MIHOP ("made it happen on purpose") - the most radical version suggests that key individuals within the government planned the attacks and collaborated with al-Qaeda in carrying them out. There is a range of opinion about how this might have been achieved.

Proponents of LIHOP and MIHOP theories suggest some motives for why the government would have wanted the attacks to happen. 9/11 began the War on Terror and led directly to the US invasion of Afghanistan and indirectly to the 2003 invasion of Iraq. Conspiracy theorists point out the alleged benefits that these consequences have given to the US government, corporations, and individuals within them, including an enhanced geopolitical position, increased control of oil supplies, increased profits for the weapons and security industries, and public support for a domestic agenda that strips away civil liberties.

The case for the theories is generally built on publicly available sources following a "connect the dots" approach. These sources include news reports of government actions, terrorist activities, and physical events, and a substantial amount of video footage. Part of these arguments is a critique of the mainstream media for reporting individual facts without representing the connections between them.

Theorists offer arguments to suggest both the physical possibility and circumstantial plausibility or likelihood of a given conspiracy theory and, correspondingly, to demonstrate the physical impossibility and circumstantial implausibility of the official account. Since most conspiracy theorists argue for further independent investigations of the attacks, the basic assertion is normally only that the conspiracy theories are more likely than the mainstream account of events.

The remainder of this article provides a survey of the arguments. Some of these, such as claims that there has been a cover-up, are compatible with all three forms of theories, while most, such as the controlled demolition hypothesis, imply only the MIHOP form.

Claims that US defenses were deliberately disabled

Central to many 9/11 theories alleging government involvement is the idea that the US air defense system, NORAD, was deliberately stood down or rendered ineffective. This idea usually originates with disbelief in the 9/11 Commission Report account of the actions taken by the Federal Aviation Administration (FAA) and NORAD and other military personnel with some noting that fighter jets had responded when aircraft had wandered off course sixty seven times in the twelve months prior to 9/11 but failed to do so that day. Some theorists also suggest that the war games being conducted on September 11 were deliberately planned to coincide with the attacks to create confusion. United States Representative Cynthia McKinney, economist Michel Chossudovsky, and publisher/editor Michael Ruppert of From the Wilderness are a few of the individuals who have questioned these exercises.

The 9/11 Commission Report timeline of events in the FAA and NORAD contradicts the timeline released by NORAD shortly after the event. The Washington Post reported in its August 3, 2006 edition that

"For more than two years after the attacks, officials with NORAD and the FAA provided inaccurate information about the response to the hijackings in testimony and media appearances... Some staff members and commissioners of the Sept. 11 panel concluded that the Pentagon's initial account of how it reacted to the 2001 terrorist attacks may have been part of a deliberate effort to mislead the commission and the public... Suspicion of wrongdoing ran so deep that the 10-member commission, in a secret meeting at the end of its tenure in summer 2004, debated referring the matter to the Justice Department for criminal investigation. In the end, the panel agreed to a compromise, turning over the allegations to the inspectors general for the Defense and Transportation departments, who can make criminal referrals if they believe they are warranted".

Since the 9/11 Commission places the primary blame on communication failures within the FAA, conspiracy theorist Prof. David Ray Griffin has questioned why the US military would lie to cover up the mistakes made by that agency.

War games and training exercises

The following war games and training events were being conducted by the United States Air Force, NORAD, Central Intelligence Agency, National Reconnaissance Office, Federal Aviation Administration and Federal Emergency Management Agency (FEMA):

Northern Vigilance: an Air Force drill simulating a Russian attack, in which defense aircraft normally patrolling the Northeast are re-deployed to Canada and Alaska. Russian exercises were being held at that time in the Arctic and North Pacific and the drill was based on the observation of that exercise.

Northern Guardian as stated in the Toronto Star 09Dec.2001

Vigilant warrior as stated by Richard Clark.

Vigilant Guardian: a NORAD exercise posing an imaginary crisis to North American Air Defense outposts nationwide with a simulated air war and an air defense exercise simulating an attack on the United States.

On the morning of 9/11, 50 minutes before Flight 77 crashed into the Pentagon, the National Reconnaissance Office, who are responsible for operating US reconnaissance satellites, had scheduled an exercise simulating the crashing of an aircraft into their building, four miles from Dulles airport.

Tripod II, a FEMA drill simulating a biowarfare attack in New York City, was to take place on September 12.

Norman Mineta 9/11 Commission testimony

During the 9/11 Commission's public hearings, Secretary of Transportation Norman Mineta offered the following testimony:

There was a young man who had come in and said to the vice president, "The plane is 50 miles out. The plane is 30 miles out." And when it got down to, "The plane is 10 miles out," the young man also said to the vice president, "Do the orders still stand?" And the vice president turned and whipped his neck around and said, "Of course the orders still stand. Have you heard anything to the contrary?

Several conspiracy theorists have posited that the orders spoken of must have been an order to not shoot down the plane that was approaching the Pentagon. They conclude that expected action would be to shoot down the approaching plane and the unusual nature of the order explains the young man's disbelief. However, while in the full transcript Mineta clarified that he was later told that the order being discussed was indeed a shoot down order, the 911 commission found that "A shootdown authorization was not communicated to the NORAD air defense sector until 28 minutes after United 93 had crashed in Pennsylvania", some 55 minutes after the Pentagon was hit.

Allegations of insider foreknowledge

With reference to intelligence failures that took place before the attacks, the 9/11 Commission Report concluded that both the Bush and Clinton Administrations had been "not well served" by the CIA or FBI. Numerous whistleblowers and officials have surfaced, claiming that there was a deliberate effort, from high-ranking officials, to prevent investigations into Al Qaeda. Former British Environment Minister, Michael Meacher, suggests that individuals within the United States government and private sector knew of the impending attacks and deliberately failed to curtail those acts. In his book The Terror Timeline, researcher Paul Thompson has collated news reports from various mainstream media sources that state that the US administration, CIA and FBI received multiple prior warnings from foreign governments and intelligence services, including France, Germany, the UK, Israel, Jordan, Afghanistan, Egypt, Morocco and Russia. The warnings varied in their level of detail, but all stated that they believed an Al Qaeda attack inside the United States was imminent. Meacher cites these warnings, suggesting that some of them may have been deliberately ignored.

Insider trading

The Times reported on September 18 that investigations were under way into the unusually large numbers of shares in insurance companies and airlines sold off before the attack, in the UK, Italy, Germany, Japan, Switzerland, France and the US. News accounts in the weeks that followed reported a notable pattern of trading in the options of United and American Airlines as well as Morgan Stanley and other market activity. An article published in The Journal of Business in 2006 provides statistical claims of unusual put option market activity days before 9/11:

Examination of the option trading leading up to September 11 reveals that there was an unusually high level of put buying. This finding is consistent with informed investors having traded options in advance of the attacks.

In a statement to the 9/11 Commission in 2003, Mindy Kleinberg, of the 9/11 Family Steering Committee, said:

Never before on the Chicago Exchange were such large amounts of United and American Airlines options traded. These investors netted a profit of at least $5 million after the September 11th attacks. Interestingly, the names of the investors remain undisclosed and the $5 million remains unclaimed in the Chicago Exchange account.

Regarding these trades, the 9/11 Commission found no malfeasance:

A single U.S.-based institutional investor with no conceivable ties to al Qaeda purchased 95% of the UAL puts on September 6 as part of a trading strategy that also included buying 115,000 shares of American on September 10... much of the seemingly suspicious trading in American on September 10 was traced to a specific U.S.-based options trading newsletter, faxed to its subscribers on Sunday, September 9, that recommended these trades.

9/11 Truth Movement members Jim Hoffman, Michael Ruppert and David Ray Griffin are among those who criticise the 9/11 Commission for using a circular argument in concluding that the trades were innocuous primarily because there were no ties to Al-Qaeda. Ruppert also claims that the intelligence agencies constantly monitor the stock exchange and should have "connected the dots" to realise that an event was about to take place involving American Airlines, United Airlines, and the World Trade Center.

Warnings given to individuals

There have been claims that some individuals received warnings in advance of the attacks. Some claim that Pentagon officials and other members of the government (including San Francisco Mayor, Willie Lewis Brown, Jr.) cancelled their flight plans for September 11. Of his call, Brown said it "didn't come in any alarming fashion, which is why I'm hesitant to make an alarming statement. It was not an abnormal call. I'm always concerned if my flight is going to be on time, and they always alert me when I ought to be careful." Ariel Sharon, Prime Minister of Israel, is said to have canceled a planned trip to New York around the time of the attacks. Some have interpreted this as evidence he was warned to stay away. Odigo Messenger, a company based in Israel, reported that two of its employees received instant messages two hours before the attack, warning them that "something big" was going to happen soon.

World Trade Center collapse as controlled demolition

Main article: Controlled demolition hypothesis for the collapse of the World Trade Center

The collapse of the World Trade Center was a surprise to many structural engineers. No steel-framed skyscraper had ever before or since collapsed due to fire or other local damage, yet it occurred three times on September 11, 2001.

Twin Towers collapse as a controlled demolition

The Federal Emergency Management Agency Report (2002) was the initial government investigation into the collapses of the Twin Towers, and it supported the theories that had been put forward by scientific journals and presented in the mainstream media - that the damage caused by the plane impacts and the resulting fires caused a local collapse, which then led to a complete global collapse by floors 'pancaking'. After a 3-year full investigation, in 2005 the National Institute of Standards and Technology published its final report, which is now regarded as the 'official account' of the collapses of the Twin Towers.

The controlled demolition hypothesis plays a central, albeit not essential, role in the 9/11 conspiracy theories that assert that the US government is responsible for the attacks. Jeff King and Jim Hoffman were early defenders of the controlled demolition hypothesis and published their observations online. David Ray Griffin included the theory in his book The New Pearl Harbor. It received its most notable proponent to date when, in early 2006, Steven Jones, a physicist at Brigham Young University, argued that a "gravity driven collapse" without demolition charges would defy the laws of physics. Criticism of the NIST report plays a prominent role in presentations of the hypothesis. It is being criticized for not complying to FOIA, for alleged misrepresentation of WTC1&2 core structure, other shortcomings.

Critics often argue that the difficulty of preparing the building for demolition without being noticed makes controlled demolition implausible. Proponents sometimes point out that between 1993 and 2000, Marvin Bush (President Bush's brother) was on the board of directors of Securacom, a company that provided security for the World Trade Center. According to its present CEO, Barry McDaniel, the company had an ongoing contract to handle security at the World Trade Center "up to the day the buildings fell down". This last statement has been used by some conspiracy theorists to say that the contract "expired" on September 11, 2001. Mr. Bush was also a former director and now is an advisor to the board of directors to a firm called HCC Insurance Holdings, Inc., which had what it called a "small participation in the World Trade Center property insurance coverage and some of the surrounding buildings".

Building Seven collapse as a conventional controlled demolition

Seven World Trade Center collapsed at 5:20 p.m. on September 11. Although it has received relatively little attention in the mainstream media, conspiracy theorists frequently discuss the nature of its collapse. They claim that it showed signs of a conventional controlled demolition (as opposed to the Twin Towers which they claim were an unusual form of controlled demolition). They also say that since no plane hit the building, how fires caused even a local collapse is even harder to explain with Building 7 than it is with the Twin Towers. Flaming debris did fall onto the building as a result of the collapse of the twin towers, but Four, Five, and Six World Trade Center, which were all closer to the Towers than Building 7, remained standing despite also being severely damaged.

Proponents emphasise the style in which Building 7 collapsed: the speed of the total collapse (suggesting there was little resistance to the 'pancaking floors'), the sudden onset, the verticality, puffs of dust, the classic 'crimp' of the roof, and the way the rubble fell mostly within the building's footprint. It is also sometimes pointed out that the building housed the offices of various government agencies, like the Central Intelligence Agency, the Federal Bureau of Investigation, and the United States Securities and Exchange Commission, along with the City of New York's emergency command bunker; this has led to claims that the building may have been used as a 'command center' from which the main tower demolitions were controlled.

Currently, the official account of the Building 7 collapse is the FEMA report of 2002 that proposed that fires, started by falling debris from the North Tower collapse, caused a local failure and then a global collapse in a similar way to the Twin Towers. It also stated that "the specifics of the fires in WTC 7 and how they caused the building to collapse remain unknown at this time. Although the total diesel fuel on the premises contained massive potential energy, the best hypothesis has only a low probability of occurrence. Further research, investigation, and analyses are needed to resolve this issue." The full investigation by the NIST has yet to be published: it is due in late 2007; NIST have said that they had to prioritize their investigations and chose to investigate the collapse of WTC buildings 1 and 2 first, and then building 7.

Pentagon not hit by a Boeing 757

United Airlines Flight 93

According to the 9/11 Commission Report, United Airlines Flight 93 crashed in Pennsylvania as a result of an attempted cockpit invasion. However, there have been claims that it was actually shot down by US fighter jets.

This idea is promoted by author David Ray Griffin in his book The New Pearl Harbor, who cites Paul Thompson. Thompson notes that a half-ton piece of engine was reportedly found over a mile away: the Philadelphia Daily News called this fact "intriguing" because "the heat-seeking, air-to-air Sidewinder missiles aboard an F-16 would likely target one of the Boeing 757's two large engines.". Other debris from Flight 93 was found up to eight miles from the crash site, and there are also some eyewitness reports of debris falling from the sky like confetti. However, NTSB investigators say they have found no evidence the plane was shot down and Popular Mechanics argued that debris exploding away and landing far from the crash scene is not a unique occurrence in commercial airline accidents.

Thompson also examined a number of mainstream media reports and says that fighter jets were actually much closer to Flight 93 at the time of the crash than stated in the official record. He mentions witnesses who noticed a small white jet near the impact site soon after the crash. However, some say this was likely a business jet the ATC asked to investigate the crash area and that descended to an altitude of around 1500 ft to survey the impact. Ben Sliney, who was the FAA operation manager on September 11, 2001, says no military aircraft were near Flight 93. Thompson has questioned whether it is plausible that the military did not know about Flight 93 being off-course and out of contact, and suggests that his claim shows that they were aware and had sent jets to investigate and possibly shoot it down.

Jim Hoffman notes a three-minute discrepancy in the cockpit voice recording immediately prior to the flight's crash. The cockpit voice recorder transcripts end at 10:03 a.m., but Cleveland Air Traffic Control reported that Flight 93 went out of radar contact at 10:06 a.m., and FAA radar records also note a time of 10:06 a.m. Seismologists record an impact at 10:06:05 a.m., +/- a couple of seconds. Despite this, the 9/11 Commission Report concluded that the crash occurred at 10:03 a.m.

Conspiracy theorists also seized on a quote by the US Secretary of Defense, Donald Rumsfeld, in which he referenced Flight 93 as "the plane they shot down over Pennsylvania." A Pentagon official later said that Rumsfeld had misspoken.

Some internet videos, such as Loose Change, speculate that Flight 93 safely landed in Ohio, and a substituted plane was involved in the crash in Pennsylvania. Often cited is a preliminary news report that Flight 93 landed at a Cleveland airport; it was later learned that Delta Flight 1989 was the plane confused with Flight 93, and the report was retracted as inaccurate. Several websites within the 9/11 Truth Movement refute this claim, citing the wreckage at the scene, eyewitness testimony, and the difficulty of secretly substituting one plane for another.

The President's behavior

President Bush was promoting the passage of his education plan at Emma E. Booker Elementary School in Sarasota, Florida on the morning of September 11. He was apparently already aware of the first plane impact before he entered the classroom for a reading of The Pet Goat with the children. At 9:05am, Andrew Card whispered in his ear that the second Tower had been hit and that America was under attack. That the president chose to stay in the classroom, without asking for additional information from his staff, and that those staff did not volunteer any additional information or take him to a place of safety, has led to allegations that he knew that the attack was taking place, knew he was safe and knew the situation was being handled. A response is that Bush's intention was to "project strength and calm", i.e., that he did not want to cause more panic by fleeing the room, as the footage would likely have been replayed over and over on news coverage.

President Bush also made statements on two separate occasions, in late 2001 and early 2002, in which he said he saw the first plane hit the World Trade Center and that he assumed it was an accident. He could not have seen the first plane hit the tower live on commercial television, since no television stations were broadcasting footage from the area when the first plane hit. The only known footage of the first plane crashing was captured by filmmaker Jules Naudet while making a documentary about a new firefighter. The video was first broadcast on CNN later in the day and was later released as the documentary film "9/11". The White House explained his remarks as "a mistaken recollection" and some critics insisted that President Bush was referring to the aftermath and not the actual jetliner impact at 8:46 a.m.

Claims relating to the hijackings

Some of the events that took place on the planes prior to their impacts have been disputed. The maneuver carried out by Flight 77 as it approached the Pentagon has been identified as one that would have required either a very experienced pilot or a computer-controlled set flight path. The 9/11 Commission Report notes that the reported pilot of Flight 77, Hani Hanjour, was described as a "terrible pilot" by one of his instructors.

Claims that the planes were flown into their targets by computer

Jim Hoffman and the Scholars for 9/11 Truth and Justice are among those who have said the Flight Management Computer Systems on board Flights 11, 175 and 77 could have been loaded with a preset route that guided the planes to their targets. Boeing has confirmed that this would have been technically possible. Hoffman claims that this is a more likely scenario than the mainstream account of the hijackings of Flights 11, 175 and 77, and also how Flight 77 performed the unusual maneuver it made on its approach to the Pentagon. He notes Flight 93 appears to be an exception, citing the high distribution of phone calls from Flight 93 compared to the other three flights.

Some theories suggest that, rather than having preset routes entered into the planes on-board computers, the planes were modified to be flown by remote control. The controllers of the planes may have been on the ground or, as in the "doomsday plane" theory, in another aircraft. This theory argues that a blurry white object seen in the sky in videos of the World Trade Center, was a plane containing the remote controller of Flights 11 and 175, and that an aircraft that flew away from the Pentagon after that impact contained the remote controller of Flight 77. The aircraft at the Pentagon was later identified as a E-4B National Airborne Operations Center (NAOC) plane, a militarised version of a Boeing 747-200, taking part in the Global Guardian exercise.

Claims relating to the hijackers

The BBC and the Daily Telegraph reported on September 23 that some of the people named as the hijackers by the FBI were actually "alive and well". One of them was Waleed al-Shehri, who they said they had found in Casablanca, Morocco. Abdulaziz Al Omari, Saeed Alghamdi, and Khalid al-Midhar, three other hijackers, were all said to be living in the Middle East. On September 19, the FDIC even distributed a "special alert" which listed al-Mihdhar as alive (the Justice Department later said this was a typographical error). These reports have led to claims that the names of the hijackers may be incorrect, or that the hijacking scenarios outlined in the 9/11 Commission Report may not be the truth.

All of the reports have since been acknowledged as cases of mistaken identity by the publications involved and by other news organisations such as the New York Times. The BBC said that confusion may have arisen because the FBI names were common Arabic and Islamic names. In 2002, Saudi Arabia asserted that the names of the hijackers were correct.

Attention has also been given to news reports that might indicate that the named hijackers were not typical Islamic extremists, nor typical suicide terrorists. For example, Mohammad Atta reportedly ate pork, drank alcohol, gambled in casinos and went to strip clubs.

Claims relating to the cell phone calls

Mathematician A.K. Dewdney, based on a study conducted in Canada in 2003, suggested that cell phone calls from the planes used in the 9/11 attacks would have been extremely difficult. Based on this, economist Michel Chossudovsky suggests that at least part of the 9/11 Commission Report chapter on the cell phone conversations, is fabricated. According to the 9/11 Commission Report, 13 passengers from Flight 93 made a total of over 30 calls to both family and emergency personnel (though all but two of these were on air phones). There were reportedly three phones calls from Flight 11, five from Flight 175, and three from Flight 77; only two calls from these flights were recorded, placed by flight attendants Madeleine Sweeney and Betty Ong on Flight 11. Various anomalies have been claimed relating to the nature of the phone call transcripts.

Claims relating to the World Trade Center plane impacts

Some conspiracy theorists have made claims relating to the nature of the planes that were seen hitting the World Trade Center Towers. These claims range from a modification of the Boeing planes (in the form of a 'pod' on the underside), to claims that different planes were involved or that nothing hit the Towers at all ('No Boeing Theories' or 'No Plane Theories'). Many prominent members of the 9/11 Truth Movement have debunked all of these claims and the majority believe that Flights 11 and 175 hit the Towers as in the official account.

One theory, being promoted by internet-only videos, asserts that this shot of the second impact, taken from a news helicopter, depicts a superimposed CGI image.

The claim that there was a "pod" of some sort on the underside of Flight 175 has been propagated by internet videos such as 911: In Plane Site, based on photographic evidence. Referring to the photograph used to support this claim, Popular Mechanics’ Debunking 9/11 Myths quotes Ronald Greeley, director of the Space Photography Laboratory at Arizona State University, who said that “the photo reveals only the Boeing's right fairing, a pronounced bulge that contains the landing gear”. Those promoting the pod theory have been referred to as the "pod people." This claim is often combined with the claim that there was an anomalous flash as the plane hit the South Tower, to support the theory that a missile was launched from the underside of the plane just prior to impact.

Morgan Reynolds, former chief economist in the Bush Administration, who admits that he is the "black sheep" of the 9/11 Truth Movement, believes that the Boeing planes of Flights 11 and 175 could not have impacted the Towers. He has proposed that there may have been a 'plane swap' or there may have been no impacts at all, with 'video fakery' used to depict the plane crashes in news reports. The idea of computer animation being involved has been promoted by the internet-only videos 9/11 Octopus and September Clues. All such theories have been widely denounced by certain members of the 9/11 Truth Movement but there is still some debate.

Allegations of cover-up

Conspiracy theorists say they detect a pattern of behavior on the part of officials investigating the September 11 attack meant to suppress the emergence of evidence that might contradict the "official account". They associated news stories from several different sources with that pattern.

Cockpit flight and voice recorders

According to the 9/11 Commission Report, the cockpit voice recorders (CVR) or flight data recorders (FDR), or "black boxes", from Flights 11 and 175 were not recovered from the remains of the WTC attack. However, two men who worked extensively in the wreckage of the World Trade Center say they helped federal agents find three of the four "black boxes" from the jetliners:

"At one point I was assigned to take Federal Agents around the site to search for the black boxes from the planes. We were getting ready to go out. My ATV was parked at the top of the stairs at the Brooks Brothers entrance area. We loaded up about a million dollars worth of equipment and strapped it into the ATV. There were a total of four black boxes. We found three."

Ted Lopatkiewicz, spokesman for the National Transportation Safety Board, remarked that "It's extremely rare that we don't get the recorders back. I can't recall another domestic case in which we did not recover the recorders."

Except for the CVR from Flight 93, the black boxes from Flights 77 and 93 were either never recovered or were said to be too damaged to yield data. On April 18, 2002, the FBI allowed the families of victims from Flight 93 to listen to the voice recordings. In April 2006, a transcript of the CVR was released as part of the Zacarias Moussaoui trial. Some conspiracy theorists do not believe that the black boxes were damaged and that instead there has been a cover up of evidence.

In June 2007, researcher Calum Douglas, of Pilots for 9/11 Truth, presented an analysis of (allegedly) Flight 77 black box data. Douglas says he obtained the data from the National Transportation Safety Board (NTSB) after issuing a petition via the Freedom of Information Act. He concludes that the approach path and altitude on the Flight Path Animation differs from the official account of the path of Flight 77, yet the NTSB has apparently declined to comment.

Motives

"Pax Americana"

In suggesting motives for the US government to have carried out the attacks, Professor David Ray Griffin claims that a global "Pax Americana" was a dream held by many members of the Bush Administration. This dream was first articulated in the Defense Planning Guidance of 1992, drafted by Paul Wolfowitz on behalf of then Secretary of Defense Dick Cheney, a document that has been called "a blueprint for permanent American global hegemony" and has been echoed in the writings of the neoconservatives. In his lecture, "9/11: The Myth and the Reality," Griffin states that:

"Achieving this goal (American global hegemony) would require four things.
1. One of these was getting control of the world's oil, especially in Central Asia and the Middle East, and the Bush-Cheney administration came to power with plans already made to attack Afghanistan and Iraq.
2. A second requirement was a technological transformation of the military, in which fighting from space would become central.
3. A third requirement was an enormous increase in military spending, to pay for these new wars and for weaponizing space.
4. A fourth need was to modify the doctrine of preemptive attack, so that America would be able to attack other countries even if they posed no imminent threat.
These four elements would, moreover, require a fifth: an event that would make the American people ready to accept these imperialistic policies."

Some of the most widely cited writings of the neoconservatives come from the think-tank the "Project for a New American Century". This group contained numerous members of the Bush Administration including Dick Cheney, Donald Rumsfeld, Paul Wolfowitz and Jeb Bush. A document published in 2000 entitled "Rebuilding America's Defenses" called for increased spending in order to transform the military. It goes on to say:

"This process of transformation... is likely to be a long one, absent some catastrophic and catalyzing event — like a new Pearl Harbor."

In his book "The Grand Chessboard" (1997), geostrategist Zbigniew Brzezinski, National Security Advisor in the Carter Administration, sets out to formulate "a comprehensive and integrated Eurasian geostrategy... it is imperative that no Eurasian challenger emerges, capable of dominating Eurasia and thus of also challenging America." Later in the book he states that:

"As America becomes an increasingly multicultural society, it may find it more difficult to fashion a consensus on foreign policy issues, except in the circumstances of a truly massive and widely perceived direct external threat."

The War on Terror is seen by many as the pretext for achieving the goals of the neoconservatives. Jim Hoffman is among those who claim that a key motive for 9/11 may have been to create a "perpetual threat", terrorism, to function in a similar way to communism during the Cold War. He cites an article in the Washington Post in which Dick Cheney says of the War on Terror: "It may never end. At least, not in our lifetime."

Since 9/11, the US government have introduced numerous acts of congress which, some people say, is an invasion of their civil liberties and are "in direct contradiction with the US constitution". These claims normally refer to the PATRIOT Act, the Homeland Security Bill, the militarisation of the police force, the nullification of the Posse Comitatus Act, and the changes in laws relating to rights of prisoners in Guantanamo Bay.

The New World Order

The perpetrators of the attacks are sometimes thought to be a "shadow government" controlling the White House and both major political parties. They are also said to control certain foreign governments, global corporations and the mainstream news media, and are referred to as the "New World Order". Some of the individuals believed to be working for this group are members of such groups as the Council on Foreign Relations, Trilateral Commission and the Bilderberg Group. The term itself gained popularity following its use in the early 1990s, first by President George H W Bush when he referred to his "dream of a New World Order" in his speech to congress on September 11, 1990, and second by David Rockefeller in a Statement to the United Nations Business Council in September 1994:

"We are on the verge of a global transformation. All we need is the right major crisis and the nations will accept the New World Order."

The concept of this shadow government pre-dates 1990 and they are accused of being the same group of people who, among other things, created the Federal Reserve Act (1913), supported the Bolshevik Revolution (1917), and supported the rise of the Nazi Party in Germany, all for their own agenda. Indeed, the domestic agenda of the Bush Administration since 9/11 has been compared to that of the Nazi Party following the Reichstag Fire of 1933. The World Bank and national central banks are said to be the tools of the New World Order; war generates massive profits for central banks, as government spending (hence borrowing at interest from the central banks) increases dramatically in times of war.

Oil and corporate profits

Michael Ruppert, a former narcotics officer, is the creator of the alternative news organization "From the Wilderness", which reports primarily on the "Peak Oil" crisis. In his lecture "The Truth and Lies of 9/11" he asserts that the primary motive for 9/11 and subsequent wars was the need for a pretext to launch a war for the last remaining sources of oil. He also highlights the importance and value of the drug trafficking industry to the global economy, estimating it to be worth almost $600 billion to Wall Street and U.S. banks which launder the money generated by the industry. Ruppert speculates that the Afghanistan opium industry, which the Taliban had practically eliminated in 2000-2001, may have been a reason that country was chosen as the starting point for "oil wars" in the Middle East.

The War on Terror, particularly the occupations of Afghanistan and Iraq, generates massive profits for the oil, security, weapons, insurance and defense contracting industries. Military, intelligence and security budgets have soared since 9/11. Additionally, it is alleged that drug traffickers and money launderers have benefited greatly from the invasion of Afghanistan and its opium fields. It is thought that all these factors may be significant in explaining the success of the operation and its continued cover-up.

It has also been suggested that Larry Silverstein, the owner of the World Trade Center, may have benefited from the insurance payouts. Silverstein purchased a 99-year lease on the complex in July 2001. Following the attacks, he sought a $7.1billion payout, claiming that the two plane impacts were two separate attacks. The World Trade Center also contained a large amount of asbestos that was required to be removed; some claim that the cost of carrying out this task would have been in excess of $1 billion. It has also been claimed that the office space within the building was unprofitable and the area was in need of urban renewal.

Plans for invasions

There are claims that the 2001 invasion of Afghanistan was being planned before 9/11. On June 26 2001, the Indian public affairs magazine News Insight revealed plans for a joint US-Russian invasion of Afghanistan to remove the Taleban government. It reported that India and Iran would 'facilitate' the invasion. The BBC reported on September 18 2001 that Niaz Naik, a former Pakistani Foreign Secretary, was told by senior American officials in mid-July that military action against Afghanistan would go ahead by the middle of October. MSNBC reported on May 16 2002 that President Bush received plans to begin a worldwide war on al-Qaeda on September 9 2001, two days before the 9/11 attacks.

Conspiracy theorists have questioned whether 9/11 provided the United States and the United Kingdom with a reason to launch a war they had wanted for some time, and suggest that this gives them a strong motive for either carrying out the attacks, or allowing them to take place. Tony Blair said to the Commons Liaison Committee in July 2002 that "To be truthful about it, there was no way we could have got the public consent to have suddenly launched a campaign on Afghanistan but for what happened on September 11"

It has also been suggested that the 2003 invasion of Iraq was on President Bush's 'to-do' list from the time he was elected into office and even before. Although the pretext for the war was that Saddam was in possession of 'weapons of mass destruction,' some say that 9/11 was part of a plan to create a 'climate of fear' to win support for an invasion, followed by a long period of occupation. Paul O'Neill, George Bush's first Treasury Secretary, reported that in a meeting in January 2001, the president discussed an invasion and occupation of Iraq. "It was all about finding a way to do it. That was the tone of it. The president saying ‘Go find me a way to do this,’" O'Neill told CBS.

Suggested historical precedents

Members of the 9/11 Truth Movement sometimes bring up examples from history of where a government has (allegedly in some cases) either carried out a false flag attack or deliberately allowed a real attack to take place. There are a number of common reasons that these historical examples are brought up:

Some say that there are striking similarities between the motives for these attacks and the suggested motives in the case of 9/11 - in particular, to generate public support for wars and/or giving up their domestic civil liberties.
Some say that they show that governments are more concerned with their long-term agendas than they are with protecting the lives of their own citizens. Operation Northwoods, a plan written by members of the Kennedy Administration, is particularly cited as demonstrating this.
Some say that they show that conspiracies, even those involving large numbers of people such as Operation Gladio, have in the past been successfully kept secret for a number of years.

Events that some conspiracy theorists say were carried out by various governments include:

47AD: Popular lore says that Emperor Nero ordered one of the fires that burned Rome so that he could blame it on the Christians. Contrary to the assertions of conspiracy theorists, the cause of the fire is not really known, and the persecution of Christians by Nero was brief and local.
1898: Attack on USS Maine begins Spanish-American War.
1915: Sinking of the RMS Lusitania brings the United States into World War I.
1933: The Reichstag fire is often thought by conspiracy theorists to have been started by Adolf Hitler to justify laws conflicting with the German Constitution.
1939: Nazi Operation Himmler begins World War II.
1941: Japanese attack on Pearl Harbor brings the United States into World War II.

The mainstream media often draws attention to the similarities between 9/11 and the Japanese attack on Pearl Harbor in 1941, which drew the United States into World War II. On the evening of September 11 2001, President George W. Bush himself wrote in his diary: “The Pearl Harbor of the 21st Century took place today.” Some members of the 9/11 Truth Movement have also drawn parallels between the two events. David Ray Griffin has claimed that President Roosevelt not only provoked the Japanese to attack, but also ignored specific warnings that the attacks were coming and even took action to ensure that it was successful. His motives for doing so would have been to take the United States to war without seeming like the aggressor. Another similarity between the events is the number of victims, approximately three thousand in both cases, that were allegedly killed in events authorized by their own governments.

1953: Operation Ajax supports a coup in Iran. Operations based on this model were used to support similar coups in other nations.
1954-1982: Operation Gladio, a series of coordinated false flag terrorist attacks, mostly in Italy and western Europe.
1962: President John F. Kennedy refuses to authorize Operation Northwoods.

Operation Northwoods was a plan proposed by U.S. Department of Defense leaders in 1962 during the Kennedy Administration with the aim of generating U.S. public support for military action against the Cuban government of Fidel Castro. The plan suggested various false flag actions, including simulated or real state sponsored acts of terrorism on U.S. and Cuban soil. This included a plan to fill a plane with CIA agents posing as college students flying over Cuba en route to a vacation destination. The plane was to be replaced, midflight, with a drone filled with explosives which was to be flown over Cuban airspace and exploded with the pretense that the plane full of college students had been shot down by the Castro regime. The plans had the written approval of all of the Joint Chiefs of Staff and were presented to President Kennedy's Defense Secretary, Robert McNamara, in March 1962. The Kennedy Administration rejected the plan.

1964: Gulf of Tonkin incident brings the United States into the Vietnam War.
1990: "Kuwaiti incubator baby hoax" generates public support for the Persian Gulf War.
1993: World Trade Center bombings.
1995: Oklahoma City bombing.

Theories involving foreign governments

Saudi Arabia and the Bin Laden Family

The movie Fahrenheit 9/11 alleges strong business connections between the Bush family and the bin Laden family. It relates how Salem bin Laden invested heavily in Arbusto Energy, a company run by George W. Bush, through his friend James R. Bath. Several members of the Bush family are investors in the Carlyle Group, a defense contractor and investment fund with numerous interests in the Saudi Arabia and the Middle East and connections to the Saudi Binladen Group, run by former Bush administration Secretary of Defense Frank Carlucci. On September 10 2001, former President George H.W. Bush and several members of his cabinet had been present at a Carlyle Group business conference with Shafig bin Laden, a half-brother of Osama bin Laden, at the Ritz-Carlton hotel located several miles from the Pentagon. The conference was continuing with the remaining cabinet members and Bin Laden's brother at the time of the Pentagon attack. George H.W. Bush remained an advisor to the Carlyle Group for two years after the attacks.

In June 2001, a "high-placed member of a US intelligence agency" told BBC reporter Greg Palast that "after the 2000 elections, the agencies were told to "back off" investigating the Bin Ladens and Saudi royals". Various individuals within the United States intelligence community have come forward with information suggesting that their investigations into terrorist suspects were being deliberately blocked by their superiors.

The New York Times reported that members of the bin Laden family were driven or flown under Federal Bureau of Investigation (FBI) supervision to a secret assembly point in Texas and then to Washington from where they left the country on a private charter plane when airports reopened three days after the attacks. The official 9/11 commission later concluded that "the FBI conducted a satisfactory screening of Saudi nationals who left the United States on charter flights" and that the exodus was approved by special advisor Richard Clarke after a request by Saudi Arabia who feared for the safety of their nationals. On June 20,2007 the public interest group Judicial Watch released FBI documents that it says suggested that Osama bin Laden himself may have chartered one of the flights. Judicial Watch President Tom Fitton accused the FBI of conducting a "slapdash" investigation of the flights.

Former Congresswoman Cynthia McKinney (D-Ga.) is among those who have questioned whether the Bush Administration may have worked with Al Qaeda to carry out the attacks.

Israel

Some theories claim that the state of Israel, or at least the Mossad, may have played a role in the attacks.

On September 17, 2001, the Israeli newspaper Ha'aretz' reported that four hours after the attack, the FBI arrested five Israelis who had been filming the smoking skyline from the roof of a white van in the parking lot of an apartment building, for "puzzling behavior". The Israelis were said to have been videotaping the disaster with cries of joy and mockery. Police found the van and a search revealed $4,700 in cash hidden, along with foreign passports and a boxcutter which aroused suspicions and led to the detention of the occupants. There has been speculation as to whether the men had advance knowledge of the attacks. On June 21, 2002, ABC reported that the FBI had concluded that the van's driver, Sivan Kurzberg and his brother Paul were Mossad operatives, but that none of them had advance knowledge of the September 11 attacks. When asked why they were smiling with the burning towers in the background both the lawyers for the men and the Israeli Embassy attributed it to immature conduct; they were released and deported to Israel in November 2001.

These theories also often highlight the number of Israelis among those arrested after 9/11: according to Fox News, there were at least 60 (out of a total of 762 suspects that were rounded up in the United States). Some of them were part of a larger investigation into Israeli espionage in the United States. In March, 2001, the US Office of the National Counterintelligence Executive had issued a warning about people identifying themselves as "Israeli art students" attempting to bypass security and gain entry to federal buildings, and even to the private residences of senior federal officials. It has been suggested that operatives in this "art student spy ring" were tracking the 9/11 hijackers and knew that the attacks were going to take place, although a Drug Enforcement Agency memo leaked in December 2001, warning military bases to be on the alert for “possible intelligence collection being conducted by Israeli art students”, was primarily concerned with the students efforts to foil investigations into unrelated Israeli organized crime.

These theories generally also highlight reports about possible Israeli foreknowledge: that the Mossad gave warnings to both the FBI and CIA of an imminent attack, claims that Ariel Sharon cancelled his September 11 travel plans, and e-mails warning of an attack received by employees of Israeli company Odigo on the morning of September 11.

Saddam Hussein

Further information: Saddam Hussein and al-Qaeda, Saddam Hussein and al-Qaeda timeline, and 9/11 opinion polls

On September 18, 2003, President George W. Bush said "We have no evidence that Saddam Hussein was involved with the September 11" attacks despite a poll released at that time that found that nearly 70% of respondents believed the late Iraqi leader probably was personally involved. He also said that "There's no question that Saddam Hussein had Al Qaeda ties." The 9/11 Commission Report stated that there is "no credible evidence" that Saddam Hussein's government in Iraq collaborated with the al Qaeda terrorist network on any attacks on the United States.

On June 29, 2005 Robin Hayes a Republican Congressman from North Carolina and vice chairman of the House Subcommittee on Terrorism at that time stated "evidence is clear" that "Saddam Hussein and people like him were very much involved in 9/11". Senator John McCain reacting to the Congressman's statement said "I haven't seen compelling evidence of that"

NewsMax.com reported that people within and outside the U.S. government believed that then Iraqi leader Saddam Hussein conspired in the 9/11 attacks and the Oklahoma City Bombing. The theory extended from the one advanced by investigative journalist Jayna Davis in her book The Third Terrorist linking Hussein to the Oklahoma City Bombing. It was discussed in an op-ed piece in the Wall Street Journal.

In a Newsweek Magazine poll released on June 23, 2007, 41% of American respondents agreed with the statement that "Saddam Hussein’s regime in Iraq was directly involved in planning, financing, or carrying out the terrorist attacks of September 11, 2001" while 50% of respondents disagreed with this statement and 9% of respondents did not know. The percentage of respondents agreeing with this statement was up 5% from 2004. A New York Times/CBS News poll released on the sixth anniversary of the attacks found that 33% of American respondents in general 40% of Republican respondents and 27% of Democratic respondents believe Saddam Hussein was "personally involved" in the attacks. Several analysts said that in part the results of the poll reflect what many people want to believe .

Anti-Semitic theories

Some conspiracy theories hold that Israel played a role in carrying out the September 11 attacks. Others go further to suggest that 9/11 was part of an international Zionist conspiracy. According to the Anti-Defamation League, "anti-Semitic conspiracy theories have not been accepted in mainstream circles in the U.S.," but "this is not the case in the Arab and Muslim world." The Anti-Defamation League has published a paper, Unraveling Anti-Semitic 9/11 Conspiracy Theories, identifying the claims made and responding to them.

One of the most popular claims in these theories is that 4,000 Jewish employees skipped work at the WTC on September 11. This was first reported on September 17 by the Lebanese Hezbollah-owned satellite television channel Al-Manar and is believed to be based on the September 12 edition of the Jerusalem Post’s claim that 4,000 Jews were missing in the WTC attack. Both turned out to be incorrect; the number of Jews who died in the attacks is variously estimated at between 270 to 400. The lower figure tracks closely with the percentage of Jews living in the New York area and partial surveys of the victims listed religion. Five Israeli citizens died in the attack.

Several websites of the 9/11 truth movement have worked to debunk the anti-Semitic claims and expose websites and individuals engaging in Anti-Semitism, along with Holocaust denial.

Media reaction

While discussion and coverage of these theories is mainly confined to internet chat sites and conversation, a number of mainstream news outlets around the world have covered the issue.

The Norwegian version of the July 2006 Le Monde diplomatique sparked interest when they ran, on their own initiative, a three page main story on the 9/11 attacks and summarized the various types of 9/11 conspiracy theories (which were not specifically endorsed by the newspaper, only recensed). The Voltaire Network, which has changed position since the September 11 attacks and whose director, Thierry Meyssan, became a leading proponent of 9/11 conspiracy theory, explained that although the Norwegian version of Le Monde diplomatique had allowed it to translate and publish this article on its website, the mother-house, in France, categorically refused it this right, thus displaying an open debate between various national editions. In December 2006, the French version published an article by Alexander Cockburn, co-editor of CounterPunch, which strongly criticized the endorsement of conspiracy theories by the US left-wing, alleging that it was a sign of "theoretical emptiness."

An article in the September 11 2006 edition of Time Magazine comments that the major 9/11 conspiracy theories “depend on circumstantial evidence, facts without analysis or documentation, quotes taken out of context and the scattered testimony of traumatized eyewitnesses”, and enjoy continued popularity due to the fact that “the idea that there is a malevolent controlling force orchestrating global events is, in a perverse way, comforting”. It concludes that “conspiracy theories are part of the process by which Americans deal with traumatic public events” and constitute “an American form of national mourning.”

The Daily Telegraph published an article called "The CIA couldn't have organised this..." which said "The same people who are making a mess of Iraq were never so clever or devious that they could stage a complex assault on two narrow towers of steel and glass" and "if there is a nefarious plot in all this bad planning, it is one improvised by a confederacy of dunces". This article mainly attacked Scholars for 9/11 Truth, a group of scientists which was, at the time, led by Professor Steven E. Jones. They said "most of them aren't scientists but instructors... at second-rate colleges".

A major Australian newspaper "The Daily Telegraph", published an article in May 2007 that was highly critical of 9/11 conspiracy theories.

The History Channel aired a documentary regarding 9/11 Conspiracy on August 20th 2007. The documentary was critical of the conspiracy theories.

Criticism

Critics of these alternative theories say they are a form of conspiracism common throughout history after a traumatic event in which conspiracy theories emerge as a mythic form of explanation (Barkun, 2003). A related criticism addresses the form of research on which the theories are based. Thomas W. Eagar, an engineering professor at MIT, suggested they "use the 'reverse scientific method'. They determine what happened, throw out all the data that doesn't fit their conclusion, and then hail their findings as the only possible conclusion." Eagar's criticisms also exemplify a common stance that the theories are best ignored. "I've told people that if the argument gets too mainstream, I'll engage in the debate." This, he continues, happened when Steve Jones took up the issue. The basic assumption is that conspiracy theories emerge a set of previously held or quickly assembled beliefs about how society works, which are then legitimized by further "research". Taking such beliefs seriously, even if only to criticize them, it is argued, merely grants them further legitimacy.

Michael Shermer, writing in Scientific American, said: "The mistaken belief that a handful of unexplained anomalies can undermine a well-established theory lies at the heart of all conspiratorial thinking (as well as Holocaust denial and the various crank theories of physics). All the "evidence" for a 9/11 conspiracy falls under the rubric of this fallacy. Such notions are easily refuted by noting that scientific theories are not built on single facts alone but on a convergence of evidence assembled from multiple lines of inquiry."

There are also behavioristic objections to these conspiracy theories, arguing that the conspiracy theorists behave in an irrational or unscholarly way. One objection is that the conspiracy theorists tend to connect unrelated information. Another is that they will often expand the conspiracy to include those who debunk their original theories, such as Popular Mechanics. There is also the tendency of the conspiracy theorists to quote only other conspiracy theorists and provide little if any expert verification of any of their claims.

Scientific American, Popular Mechanics, and The Skeptic's Dictionary have published articles that debunk various 9/11 conspiracy theories. Proponents of these theories have attacked the contribution to the Popular Mechanics article by senior researcher Ben Chertoff, who they say is cousin of Michael Chertoff — current head of Homeland Security. However, U.S News says no indication of an actual connection has been revealed and Ben Chertoff has denied the allegation. Popular Mechanics has published a book entitled Debunking 9/11 Myths that expands upon the research first presented in the article. Der Spiegel dismissed 9/11 conspiracy theories as a "panoply of the absurd", stating "as diverse as these theories and their adherents may be, they share a basic thought pattern: great tragedies must have great reasons." David Ray Griffin has published a book entitled Debunking 9/11 Debunking: An Answer to Popular Mechanics and Other Defenders of the Official Conspiracy Theory

From the same Time Magazine article referenced previously, "There are psychological explanations for why conspiracy theories are so seductive. Academics who study them argue that they meet a basic human need: to have the magnitude of any given effect be balanced by the magnitude of the cause behind it. A world in which tiny causes can have huge consequences feels scary and unreliable. Therefore a grand disaster like September 11 needs a grand conspiracy behind it. 'We tend to associate major events — a President or princess dying — with major causes,' says Patrick Leman, a lecturer in psychology at Royal Holloway University of London, who has conducted studies on conspiracy belief. 'If we think big events like a President being assassinated can happen at the hands of a minor individual, that points to the unpredictability and randomness of life and unsettles us.' In that sense, the idea that there is a malevolent controlling force orchestrating global events is, in a perverse way, comforting."

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Debunking The 9/11 Myths Mar. 2005
"Context of '(Before 10:06 a.m.)'".
"Context of '(Before and After 10:06 a.m.)'".
60 Seconds: Ben Sliney October 4, 2006
"Was Flight 93 Shot Down?".
^ The Crash of Flight 93: Crashing Plane Leaves Debris Field Miles Wide 2006-05-05
Kim, Won-Young and Gerald R. Baum. "Seismic Observations during September 11, 2001, Terrorist Attack (pdf)" (PDF). {{cite web}}: Unknown parameter |accessmonthday= ignored (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)
Pentagon: Rumsfeld misspoke on Flight 93 crash December 27, 2004
"Physics911 Frequently Asked Questions section".
"Archived version of the story".
"ERROR: 'Flight 93 Didn't Crash in Shanskville, PA'".
The Crash of Flight 93: Evidence Indicates Flight 93 Was Shot Down 2006-12-20
George W. Bush: Cover Stories of the People in Charge 2007-07-28
"An Interesting Day: President Bush's Movements and Actions on 9/11".
Achenbach, Joel. On 9/11, a Telling Seven-Minute Silence." Washington Post, Saturday, June 19, 2004, Page C01.
President Meets with Displaced Workers in Town Hall Meeting 2001-12-04
President Holds Town Hall Forum on Economy in California 2002-01-05
WTC film-makers still positive 4 September, 2002
Paltrow, S. (2004) "Day of Crisis: Detailed Picture of U.S. Actions on Sept. 11 Remains Elusive." Wall Street Journal March 22
. {{cite web}}: Check |url= value (help)
"Programmed Flight Control".
"Boeing 757-200 Background Information".
Title=Flight 93| Author=Jim Hoffman
"Doomsday plane" CNN Video
Hijack 'suspects' alive and well 23 September, 2001
Revealed: the men with stolen identities 23/09/2001 David Harrison
After the Attacks: Missed Cues; Saudi May Have Been Suspected in Error, Officials Say September 16, 2001
9/11 Conspiracy Theory, by Steve Hermann, BBC Editor
Panoply of the Absurd September 08, 2003
9/11 conspiracy theory, BBC News Online - The Editors
Saudis Arabia Admit Hijackers of Sept. 11 Attacks were Citizens February 06, 2002
"Strange behaviour of Mohammad Atta".
"Project Achilles Report".
More Holes in the Official Story: The 9/11 Cell Phone Calls 10 August 2004
"Phone Call Oddities".
A Critical Review of WTC 'No Plane' Theories, and Letters to the Journal of 911 Studies (look under No Planes Hit Towers?)
"ERROR: 'A Pod Was Attached to the South Tower Plane'".
Analysis of Flight 175 "Pod" and related claims%5d "9 September 2004

[[#cite_ref-132|^]] [http://www.popularmechanics.com/technology/military_law/1227842.html?page=2 "Popular Mechanics, Debunking the 9/11 Myths"].

[[#cite_ref-podpeople_133-0|^]] [http://www.oilempire.us/pod.html Pod People hijack the 9/11 truth movement". {{cite web}}: Check |url= value (help); External link in |title= (help); URL–wikilink conflict (help); line feed character in |title= at position 24 (help)
"The "Pod People" And The Plane That Crashed Into the Pentagon".
"911 In Plane Site, Debunking the Debunkers".
"Reynolds Booted from No Plane Club Inducted into 'Dirty Liars Club'".
"A Critical Review of WTC 'No Plane' Theories".
"A Critical Review of Eric Salter's Rebuttal".
"A Critical Review of WTC 'No Plane' Theories. (updated)".
""9/11 Cover-up Two-Page Summary" WantToKnow.info".
""The Coverup", 911review.com".
""9/11 Commission: The official coverup guide", 911truth.org".
"Bush asks Daschle to limit Sept. 11 probes" CNN.com
"Bush Opposes 9/11 Query Panel" CBS News
"Whistleblower Complains of FBI Obstruction" FOX News
"9-11 Commission Funding Woes" Time.com
"Bush: Documents sought by 9/11 commission 'very sensitive'" CNN.com
"9/11 commission finishes Bush, Cheney session" MSNBC
"9/11: Missing Black Boxes in World Trade Center Attacks Found by Firefighters, Analyzed by NTSB, Concealed by FBI". A CounterPunch Special Report - Did the Bush Administration Lie to Congress and the 9/11 Commission?. CounterPunch. 2005-12-19. Retrieved 2006-10-07. {{cite web}}: Cite has empty unknown parameters: |month= and |coauthors= (help)
Jones, Steven E. (2006). "FAQ: Questions and Answers" (pdf). Journal Of 9/11 Studies. {{cite web}}: External link in |publisher= (help) page 181.
Swanson, Gail (2003). Ground Zero, A collection of personal accounts. TRAC Team. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
"Voice recorders could provide crucial 9/11 clues". USAToday.
Families hear tape from hijacked Flight 93 April 18, 2002
Calum Douglas (June, 2007). "Flight 77: The Flight Data Recorder Investigation Files". Google Video. {{cite web}}: Check date values in: |date= (help)
'Rebuilding America's Defenses: Strategy, Forces and Resources For a New Century' September 2000
The 9/11 Reichstag Fire
Senate Reaches "Compromise" on Habeas Corpus that Could Still Strip Guantanamo Detainees of any Trial
The Criminalization of the State Michel Chossudovsky 3 February 2004
The Criminalization of the State Michel Chossudovsky 3 February 2004
The Money Masters: How International Bankers Gained Control Of America
The Motive for the 9/11 Attack 2006-12-29
9/11: the American Reichstag Fire
The Motive for the 9/11 Attack 2006-12-29
Gov. Pataki, acting gov. DiFrancesco laud historic Port Authority agreement to privatize World Trade Center July 24, 2001
US 'planned to attack Taleban' (BBC)
"Bush Sought 'Way' To Invade Iraq?". CBS News. 2004. Retrieved 2006-11-19. "It was all about finding a way to do it. That was the tone of it. The president saying 'Go find me a way to do this,'" says O'Neill. {{cite web}}: Unknown parameter |month= ignored (help) O'Neill Tells '60 Minutes' Iraq Was 'Topic A' 8 Months Before 9-11
Historical Precedents of 9/11, by Jim Hoffman
The document recommending Operation Northwoods: Pentagon Proposed Pretexts for Cuba Invasion in 1962 April 30, 2001
David Ruppe (2001-05-01). "U.S. Military Wanted to Provoke War With Cuba". ABC News.
Greg Schneider (March 16 2003). "Connections and Then Some: David Rubenstein Has Made Millions Pairing the Powerful With the Rich". The Washington Post. Retrieved 2007-03-06. {{cite news}}: Check date values in: |date= (help)
"Profile: Carlyle Group". Profile: Carlyle Group. {{cite web}}: Check date values in: |year= (help)CS1 maint: year (link)
Dark heart of the American dream June 16, 2002
"NEWSNIGHT Greg Palest report transcript". BBC News. 6/11/01. Retrieved 2006-04-27. {{cite web}}: Check date values in: |year= (help)CS1 maint: year (link)
"Fearing Harm, bin Laden Kin Fled From U.S.", by Patrick E. Tyler. The New York Times, September 30, 2001
"Judicial Watch".
""Connections and Then Some", The Washington Post".
Haaretz.com – 5 Israelis detained for `puzzling behavior' after WTC tragedy
Sanders, Doug. "U.S. arrests of Israelis a mystery." The Globe and Mail, Dec. 17., 2001.
"Ma'ariv Israeli newspaper, 23.11.01".
"Archive.org link to Fox News.com: Suspected Israeli Spies Held by U.S."
"Office of the National Counterintelligence Executive: Suspicious Visitors to Federal Facilities (archived at Internet Archive".}
"Telegraph.co.uk: US arrests 200 young Israelis in spying investigation".
"Salon.com: The Israeli "art student" mystery".
"Sunday Herald (UK) via Internet Archive: Were they part of a massive spy ring which shadowed the 9/11 hijackers and knew that al-Qaeda planned a devastating terrorist attack on the USA?".
Le Monde (Paris) March 5 2002
"Bush: No Saddam Links To 9/11 CBS News".
"Bush ties Al Qaeda in Iraq to Sept. 11 Los Angeles Times July 25, 2007".
"No Evidence Connecting Iraq to Al Qaeda, 9/11 Panel Says Dan Eggen Washington Post".
"GOP lawmaker: Saddam linked to 9/11 CNN".
Iraq Linked to 9-11 and Oklahoma City BombingWes Vernon, NewsMax.com, Sept. 9, 2002
The Iraq Connection: Was Saddam involved in Oklahoma City and the first WTC bombing? Micah Morrison, September 5, 2002
NEWSWEEK Poll Conducted by Princeton Survey Research Associates International June 23, 2007
War Update Newsday September 12, 2007
"Unraveling Anti-Semitic 9/11 Conspiracy Theories." New York: Anti-Defamation League, 2003. p. 1
A survey of the 1,700 victims whose religion was listed found approximately 10% were Jewish indicating around 270 in total. A survey based on the last names of victims found that around 400 (15½%) were possibly Jewish. A survey of 390 Cantor Fitzgerald employees who had public memorials (out of the 658 who died) found 49 were Jewish (12½%). According to the 2002 American Jewish Year Book, New York State's population was 9% Jewish. Sixty-four percent of the WTC victims lived in New York State.
The Mitzvah To Remember (09/05/2002) Gary Rosenblatt, August 3, 2007
The Resuscitation of Anti-Semitism: An American Perspective: An Interview with Abraham Foxman 1 October 2003
The 4,000 Jews Rumor: Rumor surrounding Sept. 11th proved untrue January 2005
Cashman, Greer Fay (2002-09-12). "Five Israeli victims remembered in capital". The Jerusalem Post. The Jerusalem Post. p. 3. Retrieved 2006-10-17.
"Muslim-Jewish-Christian Alliance for 9/11 Truth".
""No Planes and No Gas Chambers"".
"Holocaust Denial Versus 9/11 Truth".
11.September - an innsidde jobb?, Norwegian edition of Le Monde diplomatique, July 2006. See also English translation: Kim Bredesen, Was 9/11 an inside job? and other links
* Template:Fr icon Pour le Monde diplomatique norvégien, le 11 septembre est un complot intérieur US, Voltaire Network * Template:Es icon El 11 de septiembre fue un complot interno estadounidense, estima la prensa noruega
*Template:En icon Distractions from awful reality - US: the conspiracy that wasn’t, by Alexander Cockburn in Le Monde diplomatique, December 2006 *Template:Fr icon Scepticisme ou occultisme? Le complot du 11-Septembre n’aura pas lieu, by Alexander Cockburn in Le Monde diplomatique, December 2006 *Template:Ir icon Iranian translation *Template:Pt icon PODERES IMAGINÁRIOS - A "conspiração" das Torres Gêmeas
Debunking the Myths of 9/11, by Alexander Cockburn and Jeffrey St. Clair, CounterPunch, November 28, 2006
Grossman, Lev. (2006) Time.com – Why The 9/11 Conspiracies Won't Go Away
The CIA couldn't have organised this... 08/09/2006
The Daily Telegraph "Virgin's 9/11 Farce"
The History Channel "9/11 Fact or Fiction"
Walch, Tad (2006). "Controversy dogs Y.'s Jones". Utah news. Deseret News Publishing Company. Retrieved 2006-09-09.
Shermer, Michael (2005). "Fahrenheit 2777". Skeptic. Scientific American, Inc. Retrieved 2006-10-13.
^ Rothschild, Matthew (October 1, 2006). "Enough conspiracy theories, already". The Progressive.
Laucius, Joanne (November 26, 2004). "The coincidental cash value of conspiracy theories: Theorists 'make the unexplainable explainable' and, in the case of works like The Da Vinci Code, make a fair bit of money". Ottawa Citizen.
Shermer, Michael (June, 2005). "Fahrenheit 2777, 9/11 has generated the mother of all conspiracy theories". Scientific American. {{cite web}}: Check date values in: |date= (help)
"Debunking The 9/11 Myths - Mar. 2005 Cover Story". Popular Mechanics. March, 2005. {{cite web}}: Check date values in: |date= (help)
Carroll, Robert Todd (March 30, 2006). "Mass Media Bunk - 9/11 conspiracies: the war on critical thinking". The Skeptic's Dictionary.
Bollyn, Christopher (March 4, 2005). "9/11 and Chertoff". Associated Free Press.
Sullivan, Will (September 3, 2006). "Viewing 9/11 From a Grassy Knoll". Us News.
"Debunking The 9/11 Myths blog". Popular Mechanics.
Cziesche, Dominik, Jürgen Dahlkamp, Ulrich Fichtner, Ulrich Jaeger, Gunther Latsch, Gisela Leske, and Max F. Ruppert (September 8, 2003). "Panoply of the Absurd". Der Spiegel.{{cite web}}: CS1 maint: multiple names: authors list (link)
Griffin, David Ray. Debunking 9/11 Debunking: An Answer to Popular Mechanics and Other Defenders of the Official Conspiracy Theory. Olive Branch Press. ISBN 978-1566566865.
Grossman, Lev (September 3, 2006). "Why The 9/11 Conspiracies Won't Go Away". Time Magazine.

Books

Begin, Jeremy (2007). Fighting for G.O.D. (Gold, Oil, and Drugs). Trine Day Press. ISBN 978-0-9777953-3-8.
Barkun, Michael (2003). A Culture of Conspiracy: Apocalyptic Visions in Contemporary America. University of California Press. ISBN 0-520-23805-2.
Broeckers, Mathias (2006). Conspiracies, Conspiracy Theories, and the Secrets of 9/11. Progressive Press. ISBN 0930852230.
Divided We Stand: A Biography of New York's World Trade Center.
Editors of Der Spiegel (2002). Inside 9-11: What Really Happened. St. Martin's Press. ISBN 0-312-30621-0. {{cite book}}: |last= has generic name (help)
Editors of Popular Mechanics. Debunking 9/11 Myths: Why Conspiracy Theories Can't Stand Up to the Facts. ISBN 1-58816-635-X. {{cite book}}: |last= has generic name (help)
Griffin, David Ray (2007). Debunking 9/11 Debunking: An Answer to Popular Mechanics and Other Defenders of the Official Conspiracy Theory. Olive Branch Press. ISBN 1566566865. {{cite book}}: Check |isbn= value: checksum (help)
Griffin, David Ray (2006). 9/11 and American Empire: Intellectuals Speak Out, Vol. 1. Olive Branch Press. ISBN 1566566592.
Griffin, David (2004). The 9/11 Commission Report: Omissions and Distortions. Olive Branch Press. ISBN 1566565847.
Griffin, David Ray. The New Pearl Harbor: Disturbing Questions About the Bush Administration and 9/11. ISBN 1566565529. Retrieved 2007-07-26. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
Johnston, Patrick, S. (2006). Mission Accomplished (Novel). Dog Ear. ISBN 1-59858-244-5.{{cite book}}: CS1 maint: multiple names: authors list (link)
Laurent, Eric (2004). La face cachée du 11 septembre. Plon. ISBN 2-259-20030-3.
Marrs, Jim (2006). The Terror Conspiracy: Deception, 9/11 and the Loss of Liberty. Disinformation Company. ISBN 1932857435.
Meyssan, Thierry (2002). 9/11: The big lie. Carnot Editions. ISBN 2912362733.
Meyssan, Thierry (2003). Pentagate. USA Books. ISBN 1592090281.
Morgan, Rowland. 9/11 Revealed: The Unanswered Questions. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
National Commission on Terrorist Attacks (2004). The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. W. W. Norton & Co. ISBN 0393060411.
Paul, Don. Waking up from our Nightmare: The 9/11 Crimes in New York City. ISBN 0-943096-10-3. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
Ruppert, Michael. Crossing the Rubicon.
Ridgeway, James. The Five Unanswered Questions About 9/11.
Tarpley, Webster Griffin. 9/11 Synthetic Terror: Made in USA.
Thompson, Paul (2004). The Terror Timeline. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
Williams, Eric D. (2006). 9/11 101: 101 Key Points that Everyone Should Know and Consider that Prove 9/11 Was an Inside Job. Booksurge Publishing. ISBN 1419624288.
Wright, Lawrence (2006). The Looming Tower: Al-Qaeda and the Road to 9/11. Knopf. ISBN 037541486X.

External links

Official documents

Joint Chiefs Directive changing rules on intercepting hijacked planes, 1 June 2001

Final report of the "National Commission on Terrorist Attacks Upon the United States" (9-11 Commission), chaired by Thomas H. Kean, 22 July 2004

NIST Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster, October 2005

NIST Status Update on World Trade Center 7 Investigation, 29 June 2007

Supporting conspiracy theories

Websites

"911truth.org: The 9/11 Truth Movement". Retrieved 2007-10-09.
"9-11 Research: An Attempt to Uncover the Truth About September 11th, 2001 (WTC 7)". Retrieved 2006-07-30.
"9-11 Review: A Resource for Understanding the 9/11/01 Attack". Retrieved 2006-11-25.
"Architects and Engineers for 9/11 Truth!". Retrieved 2007-07-30.
"Infowars". Retrieved 2006-07-30.
"Oil Empire". Retrieved 2006-07-30.
"Patriots Question 9/11". Retrieved 2007-08-18.
"Physics911.net". Retrieved 2006-09-11.
"Pilots for 9/11 Truth". Retrieved 2007-10-24.
"Scholars for 9/11 Truth and Justice". Retrieved 2007-10-09.
"Scholars for 9/11 Truth". Retrieved 2007-10-09.

Articles

Cynthia McKinney's July 2005 Congressional Briefing on 9/11 (link broken)
"Former Top German Minister Rejects Official Story Of 911 Attacks". ratical.org. Retrieved 2006-07-30.
"9/11 an Inside Job by H. Titan, Ph. D." Retrieved 2006-07-30.
"Flight 93 Ordered Shot Down". dcdave.com. Retrieved 2006-07-30.
"Problems With the ASCE Report On The Pentagon Cast Further Doubt on 757 Account". bedoper.com. Retrieved 2006-07-30.
Democracy Now! - The New Pearl Harbor - debate between David Ray Griffin and Chip Berlet.

Videos

Template:Google video and "9/11 Mysteries Official Site". Retrieved 2006-07-30.
Template:Google video and "9/11: Press for Truth, Official Site". Retrieved 2007-10-24.
Template:Google video
"Loose Change". Retrieved 2006-07-30.
Template:Google video
Template:Google video
Template:Google video
"Zeitgeist". Retrieved 2007-10-24.

Videos of lectures

Template:Google video: two speeches given by philosopher and theologist Dr. David Ray Griffin at The Commonwealth Club in San Francisco (4/3/06) and at The Grand Lake Theater in Oakland (3/30/06).
Template:Google video: Gore Vidal speaks very critically about today's US government, 9/11 official account, US media.
Template:Google video - In his wide-ranging talk, Peter Dale Scott points out similarities that arise when you look at the assassination of JFK and the all events of 9/11. (COPA meeting in Dallas, Texas, November 18 2006)
Template:Google video: L.A. Conference, Alex Jones, 2006-06-24.

Debunking media

Official documents

U.S. Department of State Article: The Top September 11 Conspiracy Theories, 19 September 2006
U.S. Department of State - September 11 Conspiracy Theories - links to refutations of various 9/11 conspiracy theories, 20 January 2006
U.S. Department of State - How to Identify Misinformation, 27 July 2005

NIST Frequently Asked Questions, 30 August 2006

Websites

Debunking 9/11 Conspiracy Theories - examination of the controlled demolition hypothesis and other 9/11 conspiracy theories.
Journal of Debunking 9/11 Conspiracy Theories - a collection of papers critical of 9/11 conspiracy theories.
9-11 Loose Change Second Edition Viewer Guide - examination of Loose Change and 9/11 conspiracy theories by Mark Roberts.
911 Myths - articles by UK software developer and freelance writer Mike Williams on a wide range of 9/11 conspiracy theories.
Facts about 9/11. Not Fantasy.
Internet Detectives - Loose Change - a critical examination of Loose Change.
Project 911

Webpages

Snopes.com - Hunt the Boeing! - examines the claims of the Hunt the Boeing! website.
The Best Page in the Universe - There is no 9/11 conspiracy you morons. - argument against 9/11 conspiracy theories by popular Internet humorist Maddox.
Pointless waste of time - Did the U.S. government plan and execute the 9/11 attacks? - satirical article on Loose Change and 9/11 conspiracy theories.
Mike J. Wilson's 9/11 Report - computer animation of Flight 77's crash in the Pentagon.

Articles

Indications of the Imminent Collapse of the World Trade Center Buildings Disprove Explosives Theory - article from Representative Press.
Alternet - When 9/11 Conspiracy Theories Go Bad - article by David Corn.
Anti-Defamation League - Unraveling anti-semitic 9/11 conspiracy theories.
eSkeptic Newsletter - 9/11 Conspiracy Theories - article by Phil Molé.
National Review Online - 9/11 Denial - article on Thierry Meyssan's L'Effroyable Imposture by James S. Robbins, a national-security analyst & NRO contributor.
New York Magazine - The Ground Zero Grassy Knoll - article by Mark Jacobson.
Popular Mechanics - Debunking The 9/11 Myths.
Scientific American - 9/11 has generated the mother of all conspiracy theories - article by Michael Shermer.
Time - Setting the Record Straight - article by Coco Masters.
Why the 9/11 Conspiracy Theories Won't Go Away - article by Lev Grossman.
Six years later: Silly theories and sadness - an article by Newsday Columnist Ellis Henican criticising 9/11 conspiracy theories.
Gerrick Lewis. "'United 93' raises many questions". The Lantern.
Lev Grossman. "Why The 9/11 Conspiracies Won't Go Away". Time magazine. Retrieved 2006-09-12.
James Renner. "Plan 9/11 From Cyberspace". Free Times.

Videos

Template:Google video
Template:Google video - comedic documentary by Abby Scott and Ray Rivero on 9/11 conspiracy theorists who protest at Ground Zero.
Screw Loose Change video - counter-video of Loose Change 2nd Edition by Mark Iradian.
"Conspiracy Theories". CBC Television. Retrieved 2006-07-30.
"9/11 conspiracy theorists energized Five years later, purveyors claim academic momentum". CNN.com. Retrieved 2006-07-30.

Debates between conspiracy theorists

"The "Patriots and 9/11" Trap". Retrieved 2006-12-28.
"The 9/11 Conspiracy: A Skeptic's View by Ernest Partridge". The Crisis Papers, commondreams.org. Retrieved 2006-07-30. Article sympathetic to LIHOP theories but skeptical of MIHOP theories
"Picking Up Where Partridge Leaves Off: Conspiracy theorists Address a 9/11 Skeptic by Victoria Ashley and Jim Hoffman". Retrieved 2006-08-07. Pro MIHOP rebuttle to above article
Sifting Through Loose Change The 9-11 Research Companion to LOOSE CHANGE 2ND EDITION.

v t e 9/11 conspiracy theories
Key topics	Advance-knowledge conspiracy theories Opinion polls 9/11 truth movement World Trade Center controlled demolition conspiracy theories
Groups	Architects & Engineers for 9/11 Truth Million Muslim March
Film and TV	911: In Plane Site A Few Days in September Conspiracy Theory with Jesse Ventura Loose Change "Mystery of the Urinal Deuce" Zeitgeist
Books	9/11: The Big Lie American Conspiracies Among the Truthers Debunking 9/11 Myths The CIA and September 11 The New Pearl Harbor The Terror Timeline
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