President Bush, puppetered the events to secure oil reserves. They arranged a 'stand-down' of the air-force for the event. Some see a cover-up to protect the Saudi royal family and Enron's interests in Afghanistan. Others see an Al-Qaeda chain of command which ran through pro-Western Saudis and Pakistani intelligence to forces in the US (and MI6).
PSYCHOS
Scientologists have claimed that 'Thetan psychologists', with evil in mind, controlled the hijackers' actions using 'drugs and psycho-political methods'.
THE TOWERS' OWNERS
This theory proposes that the destruction of the towers required explosive demolition. Ownership of the building had changed, for the first time, shortly before the 9/11 attacks, and new owner Larry Silverstein made a $500m insurance profit. Theorists note that John O'Neill, a senior counter-intelligence officer (who had resigned from the FBI in August 2001) took over security at the WTC on the day of the attacks.
