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Anonymous
The non-bullshit answer is that Tower 7 collapsed because of damage from the shock wave caused by the collapse of towers 1 and 2. If you knew anything about structural engineering, you could do the math yourself and discover that there was no way the collapses could possibly have resulted from explosive charges of any sort, as the damage would be far more widespread if there had been any. In fact, the damage from the overpressure effects of a million plus cubic feet of air getting squeezed out of the twin towers in less than ten seconds should have been far greater; the fact that every building within two blocks of the WTC wasn't leveled is a testament to the skill of the architects who built them.
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