The chief negotiator of the Revolutionary Armed Forces of Colombia (FARC) Ivan Marquez (R) and the FARC's top commander, Rodrigo Londono Echeverri, whose nom de guerre is "Timochenko" or "Timoleon Jimenez," participate in the closing session of its 10th National Guerrilla Conference in Llanos del Yari, Caqueta Department, Colombia, on Sept. 23, 2016. (Xinhua/Juan Paez/COLPRENSA)