President Barack Obama turns and waves as he boards Air Force One at Andrews Air Force Base, Md., Monday, Dec. 10, 2012, as he travels to Michigan to visit the Daimler Detroit Diesel

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President Barack Obama turns and waves as he boards Air Force One at Andrews Air Force Base, Md., Monday, Dec. 10, 2012, as he travels to Michigan to visit the Daimler Detroit Diesel plant in Redford, Mich. (AP Photo/Charles Dharapak) less