Colombia's lead government negotiator Humberto de la Calle (C) walks next to fellow negotiators Paulina Rivero (L) and Nigeria Renteria as they arrive for peace talks with Revolutionary Armed Forces ... more 
Colombia's lead government negotiator Humberto de la Calle (C) walks next to fellow negotiators Paulina Rivero (L) and Nigeria Renteria as they arrive for peace talks with Revolutionary Armed Forces of Colombia (FARC) rebels in Havana November 28, 2013. A peace deal between FARC rebels and the Colombian government would greatly help cut cocaine production in Colombia, but Colombian officials fear new crime gangs could fill the gap while anti-narcotics police fight a new scourge: synthetic drugs. REUTERS/Enrique de la Osa (CUBA - Tags: POLITICS CIVIL UNREST CONFLICT) less 
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Reuters | Photo By ENRIQUE DE LA OSA / REUTERS
Thu, Nov 28, 2013 10:16 AM EST