911, 9/11 or Nine Eleven may refer to: == Dates == AD 911 911 BC September 11 (9/11 in the month/day date format) The 2001 September 11 attacks on the United States by al-Qaeda, commonly referred to as 9/11 11 de Septiembre, Chilean coup d'état in 1973 that ousted the democratically elected Salvador Allende Revolution of 11 September 1852, the revolt of the Buenos Aires Province against the government of Justo José de Urquiza November 9 (9/11 in the day/month... [more on Wikipedia]