U.S. Citizens Head To The Polls To Vote In Presidential Election

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A volunteer helps young voters outside the Boston Public Library... News PhotoAssistance,Boston - Massachusetts,Boston Public Library,Democracy,Election,Full Length,Horizontal,Massachusetts,Politics,USA,Volunteer,VotingPhotographer Collection: Getty Images News 2012 Getty ImagesBOSTON, MA - NOVEMBER 6: A volunteer helps young voters outside the Boston Public Library November 6, 2012 in Boston, Massachusetts. The race between incumbent President Barack Obama and Republican challenger Mitt Romney will come down to certain swing states like New Hampshire. Photo by Darren McCollester/Getty Images)