QUOTE(SpaceBoy)
Ah yes, I do remember the grass. There's actually a better movie for it, my old history teacher was showing it to us (don't know where to find it though). I have no explaination.
And about the disintegration of the plane, at least the aluminium, I'm pretty sure a good deal of the aluminium would've....for a lack of a better word, "burnt". It probably won't make the plane "disappear" - the steel would remain as iron does not oxidize like aluminium, and the temperature wouldn't have to go THAT high to get rid of aluminium (around 600 degress celcius I think - it's a censored.gif ing pain when welding aluminium). Keep in mind that I have no idea on how the plane would "disappear", or why there would be little blast marks. Though I tend to drift towards the "the plane was moving too fast to burn the grass" idea, like how people can walk over hot coals without a burn. I'm only suggesting how some of the aluminium skin would vapourize.
As for the wings shearing off, I'm sure somebody on the web has the numbers for it, but hey, if a university professor says that the wings shear off when it slams into the ground and slams into a load bearing column of the Pentagon, I'd believe him. Until somebody with better qualifications says otherwise, or somebody else disproves the fact that the wings couldn't have sheared off. And I'm pretty sure the designers would not have designed the wing to withstand the huge sudden force of slamming into the ground moving at that speed, and then slamming into a loadbearing column. And like the article said, the 12' hole was NOT made by the fuselage.
Oh, BTW, I'm playing Devil's Advocate here. Cut me a tad of slack please. Though debating is fun.
The grass would be burnt at least also from the debrees that landed on it. Do we se any burnt marks on even airplane skidmarks on the grass? No, so there goes out the window the theory of the ground moving plane to say the least.

In that post of mine you can sure see the temperatures needed to decompose that alloy's elements and by no chance those were achieved or else the silica in the ground there would be turned into liquid glass.

Guess what? No glass either.
The aerodynamical / quality tests of those planes are real tuff and from what I've seen there, the wings only would snap at best when only hitting the Pentagon (since it wasn't a ground moving plane), leaving marks in the above floors of it, if not the so called holes. And the holes are in the lower floors... plain awkward. Or the Terrorist hi-jackers were talented pilots, wich they weren't proven by documentaries about the 9/11th. See now? From Physics point of view, that story is so reliable as Tooth Fairies are.

Sorry for me saying this, but the Devil's Advocate role won't be the best part for you to play in this thread at least.
