And, if you're up to it, perhaps you can give some insight to the dynamics of a fueled +/- 350,000# 767 flying at +/- 500mph at the moment of impact with a building. I know you've mentioned it before, but I'm thinking your estimate might be a little low.
One more about the 4" steel. FEMA had no explanation for why the steel was so thin at the ends of some columns, but they said further investigation was necessary. And then NIST never bothered addressing it once they got the steel if I remember correctly. Come to think of it, there were quite a few things that FEMA thought needed further investigation...and NIST never bothered following up. That's one of my little mini projects that I'm working on, but it's way back on the list of things for me to do.
Yes I did and upon further checking I was mistaken as there were some cores that had 4.91 inches of thick steel.
Actually as usual your thinking is flawed as conservation of momentum would not explain why the lower floors collapsed with such little resistance but would show that they should have slowed the decent but it did not – so if you have any inkling of physics then something prevented that from happening. Now it doesn’t take even a slow learner to figure out what would prevent that from happening.