September 5, 2012
Jose Magana photo

Air Force One, with President Barack Obama aboard, taxis on the runway under a heavy rain before departing from Andrews Air Force Base, Md., Wednesday, Sept. 5, 2012, en route to Charlotte, N.C. for the Democratic National Convention. ( AP Photo/Jose Luis Magana)

Jose Magana photo

President Barack Obama waves as he boards from Air Force One before departing at Andrews Air Force Base, Md., Wednesday, Sept. 5, 2012, en route to Charlotte, N.C. for the Democratic National Convention. ( AP Photo/Jose Luis Magana)

Pablo Monsivais photo

President Barack Obama prepares to board Air Force One before his departure from Andrews Air Force Base, Md., Wednesday, Sept., 5, 2012. Obama is traveling to Charlotte, NC., for the Democratic National Convention.

Pablo Monsivais photo

President Barack Obama waves as he boards Air Force One before his departure from Andrews Air Force Base, Md., Wednesday, Sept., 5, 2012. Obama is traveling to Charlotte, NC., for the Democratic National Convention.