No it's not. There are plenty of websites that provide "proof" thet the U.S. gov. was behind it. Some are pretty convincing.
If you have an intrinsic enmity, based on envy, of the U.S. then you will be easily led to the conclusion that this bonehead believes.
There are people that I work with, NRA types and liberals both, that believe this.
I would agree their are plenty of raving moonbat websites with "proof" the Bush and U.S. Gov was behind 9/11, none I have seen are convincing at all.
Most are so filled with holes in their ravings, sorry I mean "theories", a Jihadist could fly a jumbo 747 right thought it