In this image provided by Colombia's government's peace negotiation team, Humberto de la Calle, head negotiator for Colombia, left, works on a plane with his colleagues as they fly from

 

              In this image provided by Colombia
In this image provided by Colombia's government's peace negotiation team, Humberto de la Calle, head negotiator for Colombia, left, works on a plane with his colleagues as they fly from Bogota, Colombia to Havana, Cuba, for continued peace negotiations with the Revolutionary Armed Forces (FARC), Sunday, Jan. 13, 2013. Talks restarted Monday in the Cuban capital after a month-long Christmas break. The rebels have been fighting the Colombian government since the 1960s. (AP Photo/Colombia's government's peace negotiation team, Edwin Lemus)