President Barack Obama pays his respects with other Americans visiting Arlington National Cemetery on Memorial Day, in Arlington, Virginia, May 27, 2013. On Memorial Day, the nation honors its military veterans and those who have died in the country's conflicts. UPI/Mike Theiler
U.S. President Barack Obama lays a wreath at the Tomb of the Unknowns during Memorial Day commemorations at Arlington National Cemetery in Arlington, Virginia on Monday, May 27, 2013. UPI/Joshua Roberts/Pool
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