The September 11 attacks (also referred to as nine-eleven) was a series of airplane suicide attacks to the World Trade Center (New York City, New York) and the Pentagon (Arlington, Virginia) in the early morning hours of September 11, 2001. Nineteen al-Qaeda terrorists hijacked four commercial airplanes from Boston, Newark, and Washington D.C. and caused 2,998 deaths and 6,291 injuries of 90 different countries in the attacks.

At 8:46 a.m. the airplanes from Logan International Airport in Boston, American Airplane Flight 11 was crushed into the World Trade Center's North Tower, and another plane from Boston, United Airlines Flight 175 hit the South Tower at 9:38. 2,606 people died and 24 missing in the buildings and 87 American Airplane and 59 United Airlines passengers killed in the incident.

American Airlines Fight 77 from Washington Dulles International in Washington D.C., was hijacked by 5 people within 35 minutes after the departure. The airplane was crushed the western façade of the Pentagon at 9:35 a.m. and 58 passengers and 6 crews and 125 people in the building were killed instantly.

United Airlines Flight 93 initially took off from Newark International Airport in Newark, hijacked and crashed a field near Sharksville, Pennsylvania at 10:03. The black box revealed that passengers and crews attempted to control the plane after they learned two previous attacks and tried to take over the flight control. 44 people including 7 crews and 5 hijackers were killed by the crush.