Popular Mechanics also debunked the 9/11 myths:
http://www.popularmechanics.com/science/defense/1227842.html
That being said, it kills me when the tin foil hatters hew and cry that a plane would have made a bigger hole in the Pentagon if it flew into it. That's probably true, except it was, is , and has always been reported that the plane hit the ground and slid/slammed into the building.