President Barack Obama walks with Air Force Col. Michael A. Minihan, commander, 89th Airlift Wing, from Marine One to Air Force One at Andrews Air Force Base, Md., Saturday, Sept. 1, 2012. (AP Photo/Cliff Owen)

Photo by: Cliff Owen

President Barack Obama walks with Air Force Col. Michael A. Minihan, commander, 89th Airlift Wing, from Marine One to Air Force One at Andrews Air Force Base, Md., Saturday, Sept. 1, 2012. (AP Photo/Cliff Owen)