It's pretty obvious to me from the video here http://www.youtube.com/watch?v=L75Gga92WO8 that an airplane hit the pentagon. 1:26 seconds into the video you can see the front of the fuselage striking the ground on the right. The next frame shows the hit on the pentagon with a white trail from the right to the left(assumption since I don't think the pentagon shot anything out of itself) signalling the aircraft's path and obscuring the tree line behind.
yes
i can see the nose entering the picture from the right, near the ground
this version is a different one than i saw before...a different angle
thanks