HAVANA, June 22, 2016 (Xinhua) -- File image taken on Sept. 24, 2015 provided by the Colombian Presidency shows Colombian President Juan Manuel Santos(L) and Timoleon Jimenez(R), the top leader of the Revolutionary Armed Forces of Colombia (FARC), shaking hands as Cuban President Raul Castro (C) holding their hands in a meeting in Havana, Cuba. The Colombian government and the FARC guerrilla group announced on Wednesday they have reached a deal on a definitive bilateral ceasefire, marking a major step towards ending a half-century conflict. (Xinhua/Cesar Carrion/Colombian Presidency)