Quote Originally Posted by PanzerJaeger View Post
Concentrated heat above 1470 degrees Fahrenheit weakened the steel floor trusses on the effected floors, causing them to sag and pull against the outer perimeter columns. Eventually the columns snapped and the building fell in on itself. It's clearly visible from multiple different angles.

A bomb generally does not cause the kind of sustained heat for a long enough period of time to weaken steel.
Thank you. I can't recall how many times I have done a facepalm because people don't understand that you don't need to heat steel all the way up to its melting point for it to lose all structural integrity.