in the video they question how the plane was able to penetrate as far as I believe the 4th ring. remember the small black hole? they use this "evidence" to support their silly missile claim. so to those of you questioning why the impact doesn't seem to be great enough to be a 757,well to me it appears the nose of the plane penetrated pretty damn far. I also imagine too the walls of the WTC contained much more glass per square foot and you know the remainder of the walls of the WTC weren't like that solid almost fortress/bunker wall of the pentagon. so the fuel laden wings disintegrated,well pretty much the whole damn plane disintegrated,but at the apex of the force(i.e. the nose)their was enough weight behind the nose(the fuselage)almost missile like,well hell not almost,pretty much is missile like when you shear off the wings,to pierce deep into the building.
but really now,what happened to the plane then if if was a wayward missile or some crap?