New York State employee Allison Clavert shields her face from dust and soot as she walks past the New York Stock Exchange, background left, Monday morning, Sept. 17, 2001. Many workers returned to New York's financial district as stock markets and some other businesses reopened for the first time since last week's terrorist attack against the World Trade Center. (AP Photo/Charles Rex Arbogast)
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,