Iwawa is a small island within Lake Kivu in western Rwanda, right next to the border with the Democratic Republic of Congo. Officially it's a rehabilitation centre for young drug addicts, who check themselves in to get clean and learn skills such as carpentry. But some say it’s a prison, and even a training camp for fighters sent to quash rebellions in Congo. Our correspondents Hannah McNeish and Thaïs Brouck managed to get inside and see for themselves.
