"Don't be taken in by photos showing damage to the second floor or those taken after the upper floors collapsed, which happened 20-30 minutes later," Fetzer said. "In fact, debris begins to show up on the completely clean lawn in short order, which might have been dropped from a C-130 that was circling above the Pentagon or placed there by men in suits who were photographed carrying debris with them." The most striking is a piece from the fuselage of a commercial airliner, which is frequently adduced as evidence.