Obama shakes hands with Castro as they hold a bilateral meeting during the Summit of the Americas in Panama City

U.S. President Barack Obama shakes hands with Cuba’s President Raul Castro as they hold a bilateral meeting during the Summit of the Americas in Panama City April 11, 2015. Obama and Castro shook hands on Friday at the summit, a symbolically charged gesture as the pair seek to restore ties between the Cold War foes. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY