It is very difficult to get anyone to spend five minutes objectively examining the evidence, and you are the least likely person I can think of to do so.
For those willing to spend five minutes on something vitally important, here is what you do:
- Before going any further, spend a minute or two imagining a raging inferno, and visualise possible ways the collapse of a large steel frame building, with many large columns, due to fire might look like.
- Look at https://www.youtube.com/watch?v=zRpCwKRnL1M (actual collapse).
- This is how the building would have behaved in the event of the progressive collapse scenario as described by NIST: https://www.youtube.com/watch?v=cQkRR81haW8.
- This is one of several possible solutions for what was actually observed, all of which involve the failure of all columns at close to the same time: https://www.youtube.com/watch?v=Hw7W55dBbAM
(Note, even failure of all core columns simultaneously, without failure also of the external columns, cannot produce what was actually observed. All core columns, and within a second or so, all the external columns, can simulate the reality.)
To read and understand the full draft report is possible for an intelligent non specialist in a few hours. Of course, only trained structural engineers and similar (of which only a few thousand have so far become involved) can evaluate the study fully.