President Barack Obama smiles as he returns to the White House in Washington from a trip to Mexico and Costa Rica, Saturday, May 4, 2013. (AP Photo/Manuel Balce Ceneta)

 

              President Barack Obama smiles as he returns to the White House in Washington from a trip to Mexico and Costa Rica, Saturday, May 4, 2013. (AP Photo/Manuel Balce Ceneta)
President Barack Obama smiles as he returns to the White House in Washington from a trip to Mexico and Costa Rica, Saturday, May 4, 2013. (AP Photo/Manuel Balce Ceneta)