A photo from July 25 shows a United Nations base in South Sudan's capital Juba. Earlier in July, South Sudanese troops attacked civilians near the U.N. mission's headquarters in the city. Jason Patinkin/AP hide caption

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Jason Patinkin/AP

South Sudanese families sit with bags of food rations at the Ayilo Settlement Camp in northern Uganda. Refugees have been coming out of South Sudan in growing numbers since fighting resume there this summer. Durrie Bouscaren/St. Louis Public Radio hide caption

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Durrie Bouscaren/St. Louis Public Radio

As South Sudan Fights, Refugees Flow Into Uganda

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The Terrain Hotel compound was ransacked by South Sudanese troops, who went on to attack foreign aid workers holed up there. Adriane Ohanesian/AP hide caption

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Adriane Ohanesian/AP

U.N. Report Addresses Gang Rape Of Aid Workers In South Sudan

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In this Aug. 3 photo, a safe that was shot open is seen in an office of Juba's Terrain compound after it was looted July 11. South Sudanese soldiers killed a local journalist and raped foreign aid workers in a five-hour attack that day. Adriane Ohanesian via AP hide caption

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Adriane Ohanesian via AP

Aid Workers Provide Harrowing Accounts Of Being Attacked In South Sudan

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Some of the more than 30,000 Nuer civilians sheltering in a United Nations base in South Sudan's capital Juba for fear of targeted killings by government forces walk by an armored vehicle and a watchtower manned by Chinese peacekeepers. Jason Patinkin/AP hide caption

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Jason Patinkin/AP

Black smoke rises above Juba, the capital of South Sudan, on Sunday. Explosions and heavy weapons gunfire are shaking Juba Monday in the fifth day of clashes between government and opposition forces, raising the specter of a return to civil war. Iain McLellan/AP hide caption

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Iain McLellan/AP

The mystery disease in South Sudan has not been identified but is known to cause fever and unexplained bleeding. Above: an image of another hemorrhagic fever, Marburg virus, made with an electron microscope and then colorized. BSIP/UIG/Getty Images hide caption

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BSIP/UIG/Getty Images

Morning at the MSF hospital compound in Bentiu, South Sudan. The two doctors, Jiske Steensma (left) and Navpreet Sahsi, sit in front of the tents that serve as living quarters for the international workers during their three-to-six-month stints. David Gilkey/NPR hide caption

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David Gilkey/NPR

Five Days And Five Nights With Doctors Without Borders

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