On September 11th, 2001 “9-11”, 19 suicide bombers linked with the Islamic extremist group al-Quaeda hijacked four airliners and carried out suicide attacks against targets in the United States. Two planes were flown into the World Trade Center towers in New York City. A third plane hit the Pentagon just outside of Washington, D.C and the fourth plane intended to crash into the Capital Building, or possibly The White House, crashed into a field in Pennsylvania when passengers were able to divert that target, but dying as heroes.
The 9-11 Attacks On Tuesday morning of September 11, 2001, at 8:45 AM, the United States suffered a terrorist attack when an American Airlines Boeing 767 filled with 20,000 gallons of jet fuel crashed into the north tower of the World Trade Center (also known as WTC) in New York City.
These terrorist attacks became known as 9/11, which is how the American date of September 11 is written.