By Sheridan Alexander, About.com
Soldiers from the US Army, 3rd Infantry The Old Guard decorate the graves at Arlington National Cemetery for the Memorial Day weekend.
Photo by John Metzler, Superintendent: Courtesy of Arlington National CemeteryTomb of the UnknownsJohn F. Kennedy Eternal FlameSpace Shuttle Challenger Memorial
Historic JamestowneColonial WilliamsburgYorktown Battlefield
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