There is no way a Boeing 757 could have caused the damage to the Pentagon.
How do you fit a Boeing 757 into a 16-foot wide hole? Perhaps one of the biggest anomolies of 9/11 is the circumstances of the Pentagon strike. The Official Story claims that a Boeing 757 crashed into the Pentagon, buried itself into the building, and essentially vaporized due to its high speed and the resulting explosion. Yet the resulting holes on the outside walls, and within the inner rings of the Pentagon, could not accomodate an aircraft with a wingspan of 125ft and a tail section 44ft high. There is no damage from the tail section or the wings; windows are intact above the point of collision and the actual impact hole is approximately 16ft wide. The lawn in front of the Pentagon remained practically unblemished. There is no residual fire damage, no large pieces of a commercial airliner fuselage, engine or landing gear. No bodies, no luggage.
Two surveillance video cameras at a nearby Pentagon parking structure recorded something hitting the Pentagon. In March of 2002 five frames of one of the videos became public, and the Department of Defense officially released both videos to the public in May of 2006, five years after the attack and only after much pressure from Freedom of Information Act watchdog groups. Neither of these videos show anything resembling an airliner.