David Shearer, second left, the United Nations peacekeeping mission chief in South Sudan, visits the troubled region of Yei, South Sudan. Thursday, July 13. 2017. Shearer says he's considering putting a permanent U.N. presence in the town, but only if the government grants unrestricted access. The United Nations says it is considering putting a peacekeeping base in South Sudan's troubled Yei region, the first such expansion since civil war began in 2013. The peacekeeping mission's chief says Yei has "gone through a nightmare." Since fighting spread to the city a year ago, 70 percent of the population has fled. (AP Photo/Sam Mednick)
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