The September 11 attacks were a series of four coordinated Islamist terrorist attacks in the United States on September 11, 2001.
September 11 attacks may also refer to: The massacre of Drogheda during the British Cromwellian conquest of Ireland, from 3 to 11 September 1649 Mountain Meadows Massacre in Utah, from September 7 to 11, 1857 1973 Chilean coup d'état, on September 11, 1973 2012 Benghazi attack, an assault on American facilities in Libya on September 11, 2012
See also September 11 911 (disambiguation)