President Barack Obama walks across the wet tarmac to greets people as 

President Barack Obama walks across the wet tarmac to greets people as he arrives on Air Force One at Rickenbacker International Airport in Columbus, Ohio,  Tuesday, Aug. 21, 2012. (AP Photo/Carolyn Kaster)
Associated Press
President Barack Obama walks across the wet tarmac to greets people as he arrives on Air Force One at Rickenbacker International Airport in Columbus, Ohio, Tuesday, Aug. 21, 2012. (AP Photo/Carolyn Kaster)
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