Firemen Explosion Testimony One of the most common conspiracy theories surrounding 9/11 is that the WTC buildings were destroyed by a controlled demolition. In 2006, a group named the Architects and Engineers for 9/11 Truth movement was formed with the goal of getting the U.S. Congress to perform an independent investigation into the September 11 attacks. The group has submitted a petition with the signatures of over 1,600 professional architects, engineers, and demolition specialists who feel the evidence shows that the towers were destroyed by controlled demolition. The current explanation is that WTC 1, WTC 2, and 7 WTC were brought down by the impact of two large airplanes, which caused the inward bowing of vital building columns. The impact of the aircraft also created large fires that buckled the buildings core. The description is plausible, but it immediately drew criticism from engineers around the world who concluded the evidence shows the buildings were demolished by explosives. Some anomalies include the “free fall acceleration of the structures, the durlateral ejection of steel, and the mid-air pulverization of concrete.”It has been suggested that the lack of “large gradual deformations” associated with the collapse shows the buildings were brought down by controlled demolition. It has also been pointed out that the buildings fell through the “path of greatest resistance” which requires the removal of critical columns. AE911 has examined the debris from Ground Zero and discovered signs of molten iron, thermite, and unignited nano-thermite, which is evidence for highly explosive materials.In the videos captured on 9/11, very few (if any) bombs are heard or witnessed by the camera. The best evidence for the presence of bombs on 9/11 includes a series of video interviews taken on the day of the attack. In the footage, many people can be seen describing the sound of large explosions and falling debris in the WTC. One such case is a famous clip that shows two firefighters describing three large explosions that occurred in the lobby of one of the buildings. The men are clearly distraught and the video shows the horror felt by the FDNY as they attempted to save lives on 9/11.