U.S. President Barack Obama, right, and Mitt Romney, Republican presidential candidate, participate in a presidential debate at the University of Denver in Denver, Colorado, U.S., on Wednesday, Oct. 3, 2012. Photographer: Andrew Harrer/Bloomberg
U.S. President Barack Obama, right, and Mitt Romney, Republican presidential candidate, participate in a presidential debate at the University of Denver in Denver, Colorado, U.S., on Wednesday, Oct. 3, 2012. Photographer: Andrew Harrer/Bloomberg
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