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Originally Posted by willravel
It's the South Tower that broke in the middle. Here, I'll show you.
http://www.plaguepuppy.net/public_ht...tion_wave.mpeg
South Tower
http://www.plaguepuppy.net/public_ht...pse%2001_a.avi
North Tower
Notice that the largest 'puff line' is coming from the top floor, not farther down. That strongly suggests it collapsed from the top floor down. This, of course, is confusing considering that the (theoritically) hottest spot in the building would be nearest to the fire, which is at the crash point. The picture suggests that the structure lost it's integrity from top to bottom, but that's just my interpretation. |
Watch the clips again, none of them show the start of the collapse. Each one is already in progress. Second, because the tower has an inner and outer part, the inner could have started the collapse a few second before the outer making the roof cave in like you said, and subsequently bring the entire building down, although I can find no graphical evidence that the roof went first.