Len, in case you don't know what Wall was talking about, I think this will clarify.........
Short version:
Longer version: Kevin Ryan's lecture is one of the best ones there is on the subject....and he was fired after bringing up excellent, and legitimate challenges to what was in error in the NIST report. Putting it more accurately, the NIST report was filled with deceptions.
Hey, if I paid for those buildings, I'd want my money back......the ONLY steel structured buildings to ever collapse due to fire. If it were just one thing......but it's one thing after another.