Colombia's FARC rebels say they will begin laying down arms later today, as stipulated in the November peace agreement, reports the BBC. Nearly 7,000 fighters have gathered in 26 concentration areas, and will now register their weapons with U.N. monitors and reveal hidden stashes of explosives. Full disarmament must be completed by May 30. But logistical delays have set back the calendar: 30 percent of arms were to be handed over today, instead only 320 fighters will disarm by the end of the day.