HAVANA, June 23, 2016 (Xinhua) -- Colombian President Juan Manuel Santos (L) shakes hands with Timoleon Jimenez (R), the top leader of the Revolutionary Armed Forces of Colombia (FARC), next to Cuban President Raul Castro, in the signing ceremony of a historic ceasefire agreement between the Colombian government and the FARC, in Havana, capital of Cuba, on June 23, 2016. (Xinhua/Str)