[ctlpdad]

I had hoped to see that one. I saw the earlier two on the WTC. Very chilling, but good explanations of the structure the kept me (a civil engineer) interested, but expalined it so anyone could understand.

[ken5050]

I saw the other show, as well..seems to me that the engineering world is not as sure as it used to be as to what caused the collapse...the fire supposedly weakened the spans that held the floors..but the jet fuel, which ignited the fire..all burned out quickly..what could have been in the towers that would have burned that hot?....

FWIW..what would, IMHO, be really interesting, for an article..or a TV show is what would have happened had the towers NOT collapsed..i.e. the fires were somehow put out...the challenge of demolishing the tops of the two buildings would have been even more amazing than the construction...