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Pentagon Prepares For 10th Anniversary Of September 11 Attacks

ARLINGTON, VA - JUNE 28: Groundskeeper Lucas Guzman washes the glowing light pool of a bench at the Pentagon Memorial June 28, 2011 in Arlington, Virginia. This year is the 10th anniversary of the September 11 terrorist attacks, in which 184 people were killed at the Pentagon. (Photo by Alex Wong/Getty Images)

Pentagon 9/11 Memorial

Memorial site for 9/11 attack on Pentagon