From what I read even here on FR afterwards, it seemed that the construction of the towers hit some Eco-Whackjobs’ building code limits where they couldn’t coat the supporting inside walls/shafts with Asbestos or other non-environment-frieldly-cancer-causing-but-fireproofing substances and thus weakened the structure to any type of intense fire heat.
Someone have a link to that effect?
Thermite, or some such.
Problem was it is a heavy coating, not just a thin clingy layer, and the force on it probably knocked off much of it.
I’m not sure how much it could stand, anyway. That would be ALOTof fire hitting any given spot.