It was an open floor design using trusses as flooring supports. When the trusses collapsed due to the heat it pulled in the building like an implosion.
Psycho4Bud Reviewed by Psycho4Bud on . 100% Proof About 9/11 More Remains Discovered Near WTC Site 3/28/06 -"Fire Department crews had inspected the building in the months following the attacks, but construction workers clearing gravel off the rooftop found 10 bone fragments there last fall." -and it was a "fire" that caused them to collapse? bones shattered by ferocious flames and launched to the building's adjacent? No. What deformed humans, and launched bones was indeed explosives. Rating: 5