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

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A woman casts her ballot using an electronic voting machine at an... News Photo2012 United States Presidential Election,2012 United States Presidential Election - Election Day,Adult,Ballot Slip,Barack Obama,Bowling Green - Ohio,Democracy,Elementary School,Horizontal,Machinery,Mitt Romney,Ohio,Politics,President,School Building,US President,USA,Voting,WomenPhotographer Collection: Getty Images News 2012 Getty ImagesBOWLING GREEN, OH - NOVEMBER 6: A woman casts her ballot using an electronic voting machine at an elementary school on November 6, 2012 in Bowling Green, Ohio. Voting is underway in the US presidential election in the battleground state of Ohio. Recent polls show that U.S. President Barack Obama and Republican presidential candidate Mitt Romney are in a tight race. (Photo by J.D. Pooley/Getty Images)