wtc on Instagram: "Video taken by Scott Myers showing Flight 175 hitting the South Tower. United Airlines Flight 175 hit the South Tower of the World Trade Center between floors 77 and 85 at approximately 9:03 a.m. on September 11, 2001. Its speed at impact was estimated to be between 537 mph and 586 mph, (which is equal to 941 kilometers per hour.) The high-speed collision caused the Tower to sway very violently, but the solid foundation of the complex did not collapse the tower immediately upo

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