Quote Originally Posted by PhAtBoYMr2
whatever hits the pentagon blows up instantly, like it was some sort of missle or something that hit it. Im sure if a 757 hit the pentagon it wouldnt blow up in a second, im sure it would go through the bulding and then blow up.

From the video it doesnt look like a plane at all, maybe if you slow down the video you can tell, but from the looks of how big that fire ball is and how fast it happend it looks like a cruise missle
It's hard to judge time and distance in that video because it's filmed at a frame per second. The jet would have been traveling 350+MPH. If a missle hit and did blow upon impact on the outside wall, I doubt it would have made it to the 3rd level.