On September 11th, 2001 four groups of terrorists from al-Qaeda, hijacked four aircraft. The first two crashed into the World Trade Center in New York; the third crashed into the Pentagon, the fourth crashed into a field in Pennsylvania. The first aircraft, American Airlines Flt 11 crashed into the North Tower of the World Trade Center at 8:46 AM. At 9:03 United Airlines Flight 175 crashed into the South Tower of the WTC, At 9:37 American Airlines Flight 77 crashed into the Pentagon. tT at 10:00 the fourth plane that was also heading for Washington crashed into a field in Pennsylvania at 10 AM after the passengers attempted to take back control of the aircraft. Those passengers had heard by phone of the fate of the earlier aircraft.
At 9:59 the South tour of the WTC collapsed followed by the north tower which collapsed at 10:28. A total of 2595 including 343 firefighters and police officers were killed in the World Trade Center. 175 died in the Pentagon, and 265 passengers on the planes died.