Get the day's biggest stories sent direct to your inbox so you never miss a thing Just before 8am, on Tuesday, September 11, 2001, a plane heading for California took off from an airport in Boston.
It was an event that marked the start of the deadliest terror attack the world has ever seen. In the hours that followed, terrorists hijacked four separate passenger jets, with the aim of flying them into prominent American buildings. READ MORE: When was 9/11, how many people died and how many planes were involved in the September attacks?
Two planes soared into the Twin Towers in New York, another hit the Pentagon building, while a fourth crashed into a field in Pennsylvania after passengers and crew stood up to the hijackers.
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