South Sudan's government-delegation leader Nhial Deng Nhial (left) and the rebel-delegation leader Taban Deng Gai shake hands after signing a cease-fire agreement in Addis Ababa, Ethiopia, on Thursday. STR/EPA /Landov hide caption

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A young, displaced girl cries after the relative she was with disappears into a row of latrines Sunday at a U.N. compound in Juba, South Sudan. Violence in the country has forced an estimated 70,000 people to take refuge in U.N. compounds. Ben Curtis/AP hide caption

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Tens of thousands of refugees are flocking to United Nations compounds like this one in Juba, while fears fester that fighting in the capital will resume. Tony Karumba/AFP/Getty Images hide caption

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South Sudanese seek refuge at the United Nations compound in the capital, Juba, on Sunday. Though Juba is mostly peaceful now, growing numbers are seeking shelter at the compound in fear the ethnic killings will resume. Tony Karumba/AFP/Getty Images hide caption

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Troops sent to South Sudan by the U.N. watch as men walk to a camp for refugees near Juba, the nation's capital. James Akena /Reuters /Landov hide caption

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South Sudanese pan for gold in Nanakanak, in the eastern part of the impoverished country. Tens of thousands of informal miners are looking for gold, and the government is trying to attract international mining companies to carry out the search on an industrial scale. Hannah McNeish/AFP/Getty Images hide caption

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Families wait for hours to register at the Yida refugee camp in South Sudan along the northern border in early July. Within a few weeks, the population of the camp more than doubled, leading to shortages of food, water and medicine. Paula Bronstein/Getty Images hide caption

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The South Sudan delegation, including Vice-President Riek Machar Teny-Dhurgon (second from right), are congratulated by a delegate as they take their seats after the U.N. General Assembly voted to admit the newly formed nation. Stan Honda/AFP/Getty Images hide caption

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