New York City policeman Daniel Mallo stands guard wearing a protective mask near the New York Stock Exchange building in lower Manhattan, Sept. 16, 2001. Workers are preparing the building for the reopening of the stock market on Monday. The Stock Exchange has been closed since last Tuesday's terrorist attack. (AP Photo by Robert Spencer)
Gallery: The Sept. 11, 2001, terrorist attacks
Sep. 10, 2011 @ 07:19 PM
On Tuesday, Sept. 11, terrorists hijacked airplanes and used them to destroy the Twin Towers in New York City and damage the Pentagon in Washington, D.C. One of the planes crashed in a field in rural Pennsylvania.
Excluding the 19 hijackers, the death toll stands at 2,998 with 24 more presumed dead,