U.S. President Barack Obama waves as he arrives at the convention center, where the Americas Summit is being held, in Cartagena

 
U.S. President Barack Obama waves as he arrives at the convention center, where the Americas Summit is being held, in Cartagena
U.S. President Barack Obama waves as he arrives at the convention center, where the Americas Summit is being held, in Cartagena April 14, 2012. Heads of state are meeting here from April 14-15. REUTERS/Chris Wattie (COLOMBIA - Tags: POLITICS BUSINESS)