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Originally posted by 2PacSade
All it took according to NIST was to breach columns 79, 80 &/or 81 for WTC 7 to drop!
The tower maintained its stability with the removal of columns in the
exterior walls and core columns representative of aircraft impact and
also after losing columns in the south wall due to fire effects with some
reserve capacity left, indicating that additional weakening or loss of
other structural members is needed to collapse the tower.