Visitors walk amongst graves at the Gettysburg National Cemetery in Pennsylvania November 18, 2013. The site is the burial ground for Civil War Union soldiers, where U.S. President Abraham Lincoln ... more 
Visitors walk amongst graves at the Gettysburg National Cemetery in Pennsylvania November 18, 2013. The site is the burial ground for Civil War Union soldiers, where U.S. President Abraham Lincoln travelled to in 1863 to deliver a few concluding remarks at a formal dedication. Tuesday marks the 150th anniversary of Lincoln's famous Gettysburg Address. REUTERS/Gary Cameron (UNITED STATES - Tags: ANNIVERSARY POLITICS) less 
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Reuters | Photo By GARY CAMERON / Reuters
Mon, Nov 18, 2013 5:41 PM EST