10.
Capt. Michael Dugan hangs an American flag from a light pole in front of what is left of the World Trade Center.
9.
Smoke billows from the Pentagon in Arlington, Virginia, after a commercial plane crashed into the building and set off a huge explosion.
8.
Firefighters search for survivors following the collapse of the twin towers.
7.
A US flag is set outside the Pentagon after a highjacked commercial jetliner crashed into it.
6.
An unidentified Pennsylvania state trooper stands guard at the crash site of United Airlines Flight 93 in Shanksville, Pennsylvania. The mound of dirt in the center of the field is the crater made by the plane's impact.
5.
Seattle residents wait to donate blood at the Puget Sound Blood Center on Sept. 11, 2001, in the wake of the terrorist attacks.
4.
A vigil is held in Berlin a few hours after the terrorist attacks in the US.
3.
A man looks at photos posted of people missing in the World Trade Center disaster on Sept. 14, 2001, in New York City.
2.
American Muslim women are filmed as they pray for the victims of the terrorist attacks at the Islamic Center of Southern California in Los Angeles.
1.
People cover themselves with a US flag on the US Capitol grounds during a candlelight vigil on Sept. 12, 2001.
