President Barack Obama and first lady Michelle Obama walk off Air Force One after arriving at O'Hare International Airport in Chicago, Tuesday, Nov. 6, 2012. (AP Photo/Paul Beaty)

Associated Press
President Barack Obama and first lady Michelle Obama walk off Air Force One after arriving at O'Hare International Airport in Chicago, Tuesday, Nov. 6, 2012. (AP Photo/Paul Beaty)
President Barack Obama and first lady Michelle Obama walk off Air Force One after arriving at O'Hare International Airport in Chicago, Tuesday, Nov. 6, 2012. (AP Photo/Paul Beaty)
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