There's an unbelievable amount of stuff online about 9/11 theories, most of it I'd say is false, as with huge global events there's always some made up things, the worst I've heard is missiles being fired at the towers from the planes before they crashed into it.. However I think the Pentagon story ...

Bigger ones, bit mucky, for your judgement Bench...

http://www.kboulton.karoo.net/Kylie1.jpg

http://www.kboulton.karoo.net/kylie2.jpg