Colombia's President Juan Santos stands near an image of late revolutionary hero Ernesto "Che" Guevara...
Colombia's President Juan Manuel Santos (front R), stands near an image of late revolutionary hero Ernesto "Che" Guevara (background) as he watches the ceremonial guards performing during a wreath-laying ceremony at the Jose Marti monument at Revolutionary Square in Havana, Cuba, July 17, 2017. REUTERS/Alexandre Meneghini