Thermally Expanding Dust Clouds heavily-laden with unreacted Nano-Thermate particles able to vilolently react with (Oxidation/Rustification) or melt any Iron or Aluminum they directly collide with

How did all of those vehicles get so rustified or melted?
Firstly they are are all composed of Iron & Aluminum, the exact same materials that nano-Thermate is made of.
Heated and Unreacted nano-Thermate will violently react with any Iron or Aluminum that it encounters as the highly heated and nano-Thermate laden dust clouds violently collide with the vehicles in its destructive path.

Chuck Boldwyn's Thesis for the melting and/or rustifications of the vehicles near the WTC-TTs.