Richard travels to Washington D.C and Forth Worth, Texas where he speaks with two investigators who challenge the official version of events concerning the attack on the U.S. Pentagon on September 11, 2001. Researchers present evidence to suggest the attack was perpetrated by some rogue element inside the U.S. government. Was it indeed American Airlines Flight 77 that crashed into the west wall of the Pentagon killing 125 people in the building and another 59 onboard the plane? What hit the pentagon? Was it a Tomahawk missile? Was it a bomb placed inside the building? Was it an empty passenger plane loaded with explosives guided by remote control, or Global Hawk technology? A fire and explosion expert and the publisher of a skeptical journal attempt to refute these claims.