Rebel Loot: Soldiers in Tumaco guard 3.9 tons of cocaine seized from the Revolutionary Armed Forces of Colombia. Tumaco has Colombia's highest concentration of cultivation of coca. (ASSOCIATED PRESS)
Humberto de la Calle, head of Colombia's peace negotiation team, speaks to journalists before embarking to Havana for a round of talks with rebels of the Revolutionary Armed Forces of Colombia, FARC, at the military airport in Bogota, Colombia, Sunday, Nov. 18, 2012. (AP Photo/William Fernando Martinez)
Police officers in Bogota, Columbia, on Thursday Feb. 23, 2012, hold photographs of fellow officers who were kidnapped by rebels of the Revolutionary Armed Forces of Colombia (FARC). (AP Photo/Fernando Vergara)
FILE - In this April 28, 2000 file photo, Alfonso Cano, a Revolutionary Armed Forces of Colombia (FARC) commander who will head the Boliviarian Movement, a new clandestine political party for the rebels, attends a practice ceremony for the political party opening outside of San Vicente del Caguan in the FARC controlled zone of Colombia. According to Colombian military authorities, Cano, the top FARC commander, was killed in a military operation on Friday Nov. 4, 2011. (AP Photo/Scott Dalton, File)
**FILE** Colombian army soldiers unload supplies from a helicopter during a February operation to relieve troops in Alto Guaduas, Caqueta state, in southern Colombia, a region with a strong presence of the Revolutionary Armed Forces of Colombia. (Associated Press)