The controlled demolition hypothesis states that the collapse of the World Trade Center was due to the use of explosives.
It plays a central role in the 9/11 conspiracy theories that assert that the US government is responsible for the attacks.
The Federal Emergency Management Agency Report of 2002 and the later National Institute of Standards and Technology report
of 2005 regarding the reconstruction of the collapse events of the Twin Towers and Seven World Trade Center both contradict
the controlled demolition hypothesis. Specifically, these reports do not mention any evidence that suggests that pre-positioned
explosive charges caused the collapse of buildings 2 WTC, 1 WTC and then 7 WTC. Dr. Steven Jones of BYU suggests that the
official explanation that fire and debris induced the collapse of WTC 7 is false.
