jim wrote:

ok bud you are factually wrong on some points. a staircase was still
viable on the south tower to let people escape.
where did you get the idea that planes use diesel? jp5 maybe but
certainly not glow plugs in a fanjet...
lastly, there were very few 'cross members' as you stated because the
supporting steel was actually the exoskeleton of the building. in other
words the outside of the building supported the entire structure. unique
yes but that was the wtc....

That is flat out false. The building was supported by a rigid central
core. The exoskeleton was designed to absorb wind loads and not apply
those loads to the central core. The gravitational loading of the
building was supported by the central core.