[Nielsio]

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To quote it more exactly, the government report says 'and global collapse ensued'. That's it; it describes nothing and it explains nothing. Notice that I am calling for a sequential mechanism.

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How much did a WTC floor weigh?
What is the impulse/momentum generated by a block this weight dropping 3 meters?
How does this compare to the typical load on the steel structure from say the 50 floors it would normally have to support?

Answer these three questions (it's very, very simple physics) and you'll realize that global collapse is indeed inevitable once the first floor goes.

There are legitimate questions to be raised about the collapse but it seems like you've picked the worst possible points. [img]/images/graemlins/blush.gif[/img]

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You have not described a sequential mechanism, or pointed to a source that does describe it.

It would be very interesting if you would actually give that a try. Then we can see if that mechanism matches with what we see on the videotapes and the photographs, with the speed of the collapse, things like amount of thick dust, and so on.

NIST has not dared to do it.