Stephen Sackur talks to Lam Akol, an influential politician and former foreign minister from southern Sudan, now involved in the Sudan People's Liberation Movement. Sudan faces uncertain times. The president is wanted on war crimes charges by the International Criminal Court, western aid agencies have been ordered out of Darfur, and there are fears for the future of the country's north-south peace agreement. Is Lam Akol's country facing a new round of conflict?