A stagehand uses a lint roller to clean the background on the stage at the Magness Arena at the University of Denver, Tuesday, Oct. 2, 2012, where the first presidential debate between President Barack Obama and Republican presidential candidate Mitt Romney is scheduled for Oct. 3. (AP Photo/Ed Andrieski)

Associated Press
A stagehand uses a lint roller to clean the background on the stage at the Magness Arena at the University of Denver, Tuesday, Oct. 2, 2012, where the first presidential debate between President Barack Obama and Republican presidential candidate Mitt Romney is scheduled for Oct. 3.  (AP Photo/Ed Andrieski)
A stagehand uses a lint roller to clean the background on the stage at the Magness Arena at the University of Denver, Tuesday, Oct. 2, 2012, where the first presidential debate between President Barack Obama and Republican presidential candidate Mitt Romney is scheduled for Oct. 3. (AP Photo/Ed Andrieski)
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