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Relatives of victims of the attack on the Pentagon attend ceremonies marking the 10th anniversary of the 9/11 attack on the Pentagon in Washington

Relatives of victims of the attack on the Pentagon attend ceremonies marking the 10th anniversary of the 9/11 attack on the Pentagon, in Washington, September 11, 2011. (REUTERS/Jason Reed)

9/11 Pentagon ceremony

Remembering the September 11, 2011 attack on the Pentagon.