The Resistance Paradox of the WTC Collapses

A scientist who is a 9/11 skeptic passed this concept onto me:

The WTC collapses show the lower parts of the structures offering no more resistance to the collapsing upper portions than the nearby air, yet the upper parts are turning to dust while in mid air. If one assumed this was a gravity-driven collapse brought about by plane impacts and ensuing fires, one would have to say the lower parts were offering no resistance (because of the speed of fall) and yet at the same time offering high resistance (because the top portions are turning to dust).

That is something even a junior high school science student knows is
impossible.

This is the resistance paradox.

Demolition offers the only way out of it.

By the way, if you can somehow prove that the WTC towers collapsed without demolition, Jimmy Walter is offering a one million dollar prize.