U.N. starts food airdrops in S.Sudan for Sudan refugees
The United States and aid groups have warned there is a risk of famine in both South Kordofan and Blue Nile, the two states where the fighting is taking place
Sudan "very optimistic" about border agreement with S.Sudan
Border fighting in April led to the worst violence since South Sudan became independent a year ago
Bangladeshi U.N. peacekeeper killed in Sudan's Darfur
Gunmen open fire on a U.N. police station in Darfur
South Sudan runner says fight for life led him to Games
Guor Marial says he is running for his family and to raise awareness about refugees and his fledgling nation of South Sudan
655,000 displaced in Sudan border states-UN
The United States and aid groups warn of famine in South Kordofan and Blue Nile states, especially in areas held by rebels
Sudan to allow aid into rebel-held border areas
Humanitarian groups say fighting has left civilians facing an impending famine in South Kordofan and Blue Nile