Keeping the peace in South Sudan

South Sudan is supposed to be at peace: a deal was signed with the north five years ago to end decades of civil war. But inter-ethnic fighting within the south has spiralled dangerously.

Now, the government of South Sudan is trying to address the problem – it's launched an ambitious disarmament campaign.

Rob Walker journeys across Jonglei - the largest and most violent state in southern Sudan - to ask whether the disarmament campaign can really succeed.