This article is about the day in September. For for the terrorist attacks in the United States that happened on this day in 2001, see September 11 attacks.
September 11 is the 254th day of the year(255th in leap years) in the Gregorian calendar.There are 111 days remaining until the end of the year.
1973– A military coup in Chile removes President Salvador Allende, who is subsequently killed in the event, from office. General Augusto Pinochet is installed in his place, and remains in power until March 11, 1990.