re: Explain what caused the towers to collspse.

The steel at the impact zone lost its structural integrity when the fire got to +1000 degrees. Steel loses 50% integrity at that temp.

This caused the 20+ floors above the impact zone to fall down as one piece and the structure below the impact zone was not strong enough or designed to take a vertical load of that magnitude, which caused every floor to pancake.

Since the building didn’t fall to the left/right into the Hudson…you can’t wrap your brain around it.

Therefore, it had to be 100s of ppl, installing demolition into two massive buildings for a controlled fall..all of which have remained silent…then had 20 al qeada terrorist take flight training 3 years prior to hijack planes and fly into the buildings as cover….