President Barack Obama smiles as he walks across the tarmac from the Marine One helicopter to Air Force One at Andrews Air Force Base, Md., Monday, Oct. 22, 2012, enroute to Boca Raton,

 

              President Barack Obama smiles as he walks across the tarmac from the Marine One helicopter to Air Force One at Andrews Air Force Base, Md., Monday, Oct. 22, 2012, enroute to Boca Raton,
President Barack Obama smiles as he walks across the tarmac from the Marine One helicopter to Air Force One at Andrews Air Force Base, Md., Monday, Oct. 22, 2012, enroute to Boca Raton, Fla., and the last presidential debate against Republican presidential candidate, former Massachusetts Gov. Mitt Romney. (AP Photo/Pablo Martinez Monsivais)