Pentagon Attack Animation

Pentagon Animation This animation models what may have happened to the Pentagon when it was struck by an aircraft on September 11, 2001. The aircraft model, with a load of fuel in the wing tanks, is shown hitting a grid of posts, representing the Pentagon's steel-reinforced concrete columns. The simulation shows the fuel onboard as it crashes into the building like a massive river of fluid. Three observations in the simulation stand out. (1) The columns destroyed in the building facade do not have to correspond to the wingspan; the columns cut the lightweight tips of the wings, rather than the wings cutting the columns. (2) Each reinforced concrete column cuts into the fuselage until the column is destroyed by the river of fuel. (3) The plane rapidly decelerates after impact, as witnessed by the buckling of the fuselage near the tail structure.

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