This week's special programme focus on the political, humanitarian and health crisis facing South Sudan.

In an exclusive interview with the UN Mission’s radio station in South Sudan, Radio Miraya, UN relief chief, Stephen O’Brien - who spent three days in the country seeing conditions for himself - said that all parties, political and humanitarian, needed to “work together, fast and hard, for peace”.

Lwak Nelson asked him what the UN’s priorities were for South Sudan.

Presenter: Matthew Wells

Production Assistant: Ana Carmo

Duration: 10'00″