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Photo by: Matt Rourke

A visitor to Little Round Top views the Devil's Den during ongoing activities commemorating the 150th anniversary of the Battle of Gettysburg on July 1, 2013, in Gettysburg, Pa. Union forces turned away a Confederate advance in the pivotal battle of the Civil War fought July 1-3, 1863, which was also the war’s bloodiest conflict with more than 51,000 casualties. (Associated Press)

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