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Memorial Day Commemorated At Arlington National Cemetery

ARLINGTON, VA - MAY 27: Members of the military stand before the Tomb of the Unknowns at Arlington National Cemetery on May 27, 2013 in Arlington, Virginia. For Memorial Day President Obama is paying tribute to military veterans past and present who have served and sacrificed their lives for their country. (Photo by Mark Wilson/Getty Images)

Memorial Day 2013

The U.S. is honouring those killed in America's wars on Memorial Day on Monday, May 27.