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06:35 - Zooming in on the impact zone at the east face of WTC 1 (North Tower). 09:12 - Zooming in closer on the east-face fires inside WTC 1. 15:30 - Molten substance flowing down the north face near the northeast corner of WTC 2 (South Tower), emanating between floors 80 and 81. 16:46 - Inward bending of perimeter columns at the north and east face progresses further. Top third of the South Tower begins to lean eastward and fall, total collapse starts. 17:03 - WTC-2 core remnant falls apart. Southern p
