The United Nations Secretary-General Ban Ki-moon (L, Front) is welcomed upon his arrival in Cartagena de Indias, Colombia, on Sept. 26, 2016. Colombian President Juan Manuel Santos and the top leader of the Revolutionary Armed Forces of Colombia (FARC) Timoleon Jimenez will on Monday formally sign the peace agreement agreed in August in Havana. (Xinhua/Diego Pineda/COLPRENSA)
