U.S. President Barack Obama shakes hands with Argentina's President Mauricio Macri after a speech during...
U.S. President Barack Obama shakes hands with Argentina's President Mauricio Macri after a speech during a visit at the the Parque de la Memoria (Remembrance Park), where they honored victims of Argentina's Dirty War on the 40th anniversary of the 1976 coup that initiated that period of military rule, in Buenos Aires, March 24, 2016. REUTERS/Carlos Barria