United Nations forces in Democratic Republic of Congo have launched unmanned aircraft to monitor the volatile border with Rwanda and Uganda, the first time UN peacekeepers have deployed surveillance drones. The aircraft will be used to look out for threats from a host of local and foreign armed groups in the mineral rich east where Congo and UN experts have accused Rwanda and Uganda of sending arms and troops to back the recently-defeated M23 rebels, something both countries deny. Al Jazeera's James Bays reports.