Haunting images from the 9/11 attacks
Sept. 11, 2001
Credit: AP
Firefighters unfurl a U.S. flag on the roof of the Pentagon after the attack in Washington, D.C.
Other Photos
Thousands pay tribute at NYC World Trade Memorial
Courage of Flight 93 victims lauded at dedication
Memorial held for 343 firefighters lost on 9/11
Families remember loved ones at September 11 memorial site
Names of 9/11 victims ring out at World Trade Center site
Clinton, Boehner to raise Flight 93 memorial funds
