Army sergeant Robinson Salcedo Guarin, center, accompanied by medical personnel, walks with two birds perched on his shoulder upon his arrival at an airport after being released by the Revolutionary Armed Forces of Colombia, or FARC, in Villavicencio Colombia, Monday, April 2, 2012. Colombia's main rebel group on Monday freed what it says were its last 10 soldier and police captives, all of whom had been held in jungle prisons for at least 12 years. (AP Photo/Fernando Vergara)