And your friend is wrong. Explosives placed in the building would not cause it to fall faster. The explosions simply undermine the structure, which then collapses under its own weight.beardad said:
The collapse of the World Trade Center buildings on 9/11 was caused by the impact of the hijacked airplanes and the resulting fires. The intense heat from the fires weakened the structural integrity of the buildings, causing them to collapse.
No, there is no evidence to support the theory that the collapse of the World Trade Center buildings was a controlled demolition. The National Institute of Standards and Technology (NIST) conducted a thorough investigation and concluded that the collapse was due to the impact of the airplanes and the resulting fires.
No, the collapse of the World Trade Center buildings did not occur at free-fall speed. NIST's investigation found that the collapse was a gradual process, with each floor collapsing onto the one below it. This gradual collapse resulted in a total collapse time of about 18 seconds for the North Tower and about 11 seconds for the South Tower.
World Trade Center Building 7 collapsed on 9/11 due to fire-induced structural damage. NIST's investigation found that the fires in Building 7 caused a critical support column to fail, leading to a progressive collapse of the building.
No, there is no evidence to support the use of explosives or controlled demolitions in the collapse of the World Trade Center buildings. NIST's investigation concluded that the collapse was solely caused by the impact of the airplanes and the resulting fires.