The Plane Bomb Theory
Explosives in Plane Shred It Before Impact
French researcher Eric Bart compiled an extensive body of eyewitness accounts, and provided it on his website. Bart's theory, entitled on his web page "It was a plane bomb" (IWPB), fits the eyewitness accounts better than any competing theory, and is potentially compatible with the photographic evidence of damage to the facade. Despite the strong evidentiary support for Bart's theory it has received relatively little discussion, eclipsed by the attack drone and two-plane theories.
According to this theory, the jetliner was shredded by shaped charges on the aircraft a split second before impact. It accounts for several features in the eyewitnesses' reports of the moment of impact that are difficult to reconcile with the official crash account, such as of the jet exploding or disintegrating before reaching the building.
The plane bomb theory can also account for the lack of imprint of the jetliner's profile on the Pentagon's facade. The ends of the wings and the vertical stabilizer -- the parts of the plane that did not leave impact impressions -- could have been shredded by the explosive charges, perhaps ahead of the fuselage. These relatively light components would have produced only a few tons of confetti, which is not captured in the limited number of photographs taken soon after the crash.1