Architects & Engineers for 9/11 Truth is a non-profit organization founded in 2006 that questions the official explanations of the September 11, 2001 attacks. The group consists of over 3,000 professionals in architecture and engineering who advocate for a new investigation into the collapse of the World Trade Center buildings. The organization argues that the buildings' collapse was not solely due to the impact of the aircraft and subsequent fires. They present evidence suggesting that controlled demolition may have played a role, and they seek to raise public awareness and promote further inquiry into the events of that day.