This image was taken from video of people traveling on the road near Bentiu South Sudan on Sunday April 20, 2014. U.N.'s top humanitarian official in South Sudan Toby Lanzer told The Associated Press in a phone interview Tuesday, April 23, 2014, that the ethnically targeted killings are "quite possibly a game-changer" for a conflict that has been raging since mid-December and that has exposed longstanding ethnic hostilities. (AP Photo/Toby Lanzer, United Nations)
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