The 9/11 attacks changed the world, suddenly ushering in an era of instability and insecurity that seems likely to persist for years. There’s a great deal of misinformation about the attacks, their background, and their consequences.  I’ve attempted to help sort out the confusion by putting together a set of detailed chronologies covering the events that led to and led from 9/11, as well as a timeline of the day of September 11. 
(1) Background to 9/11

(2) The Day of 9/11