The one thing I find kinda shady about 9/11 is it's actually not very easy to pilot an aircraft of that size into a specific building.
I heard one pilot describe it as driving a giant pick up truck down a street, turning into a drive way, all at a high speed perfectly into a garage spot.
They had many professional pilots with thousands of hours of flying time try to replicate the 9/11 collision path in simulators several times and only a few of them could do it after several tries.
And the "terrorists" only had a few hours in the air flying a tiny Cesna plane apparently, yet they hit their target 2/2 times.
I don't really have a huge stake in the argument one way or another, I just find it a little curious.
EDIT, here's the video clip, it's from Pilots For 9/11 Truth or something:
http://www.youtube.com/watch?v=GEQtxTnDusk
