Read this book
http://vancouver.indymedia.org/news/2004/06/141355_comment.php
(You have to cut and paste it)
For those of you too lazy to read, here's a summary, all the evidence is outlined in the book if you have doubt, which you should.
1. Evidence that the wars in Afghanistan and Iraq were already planned for geopolitical reasons, so that 9/11 provided not the reason for the wars but merely the pretext.
2. Evidence that men with connections to al-Qaeda were allowed into the United States in spite of regulations that should have kept them out
3. Evidence that men with connections to al-Qaeda were allowed to train in US flight schools.
4. Evidence that the attacks of 9/11 could not have succeeded without an order from the highest level of government to suspend normal operating procedures for responding to hijackings.
5. Evidence that US political and military leaders made misleading and even false statements about their response to the hijackings.
6. Evidence in particular that the presently accepted official account, according to which jet fighter planes were scrambled but arrived too late, was invented some days after 9/11.
7. Evidence that the collapse of the WTC buddings was brought about by explosives, so that participation by the US government in the prevention of an adequate examination of the debris, especially the steel, constitutes evidence of its participation in a cover-up.
8. Evidence that someone in authority sought to ensure that there would be deaths in the attacks on the second WTC tower and the Pentagon by not having these buildings evacuated.
9. Evidence that what hit the Pentagon was not a Boeing 757 but a much smaller aircraft, such as a guided missile.
10. Evidence that Flight 93 was shot down after authorities learned that the passengers were gaining control of it.
11. Evidence that Secretary of Defense Rumsfeld revealed advance knowledge of two of the attacks.
12. Evidence that President Bush on 9/11 feigned ignorance of the occurrence and seriousness of the attacks.
13. Evidence that President Bush and his Secret Service knew on 9/11 that he would not be a target of attacks.
14. Evidence that the FBI had specific knowledge of the time and targets of the attacks at least a month in advance.
15. Evidence that the CIA and other intelligence agencies would have had very specific advance knowledge of the attacks by means of the put options purchased shortly before 9/11.
16. Evidence that the Bush administration lied about not having had specific warnings about the attacks.
17. Evidence that the FBI and other federal agencies prevented investigations prior to 9/11 that might have uncovered the plot.
18. Evidence that US officials sought to conceal evidence of involvement by Pakistan's ISI in the planning of 9/11.
19. Evidence that US officials sought to conceal the presence of the ISI chief in Washington during the week of 9/11.
20. Evidence that the FBI and other federal agencies blocked investigations after the attacks that might have revealed the true Perpetrators.
21. Evidence that the United States did not really seek to kill or capture Osama bin Laden either before or after the attacks.
22. Evidence that figures central to the Bush administration had desired a 'new Pearl Harbor' because of various benefits it would bring.
23. Evidence of motive provided by the predictable benefits that this event, called by Bush himself 'the Pearl Harbor of the 21st century,' did bestow on the Bush administration.
24. Evidence against the alternative explanation—the incompetence theory—provided by the fact that those who were allegedly guilty of incompetence were not fired but, in some cases, promoted.
We have an old saying down on the bayou....Blehhhhh!!!