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Video: collapse of the WTC-2 (the South Tower) following its nuclear demolition.
This video-clip shows good details of the WTC-2 (the South Tower) collapse following its nuclear demolition. Please, try to remember how thick were those double-walled steel perimeter- and core columns that constituted its bearing structure. It looks strange that such a rigid structure collapses at near a speed of free fall. But it happens simply because of that fine microscopic dust which represented almost 75 % of the entire Tower structure after an underground nuclear explosion. It is very interesting to notice that an actual pattern of the South Tower collapse corresponded to the distribution of damages shown at the drawing to the right.
Steel core column found on the ground zero after the WTC demolition. It apparently belonged to upper parts of the Tower.
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