Children play on a destroyed fighter plane in Juba on April 21, 2016. Fragile hopes for an end to South Sudan's civil war are being tested by the rebel leader's failure to return to the capital to form a unity government. International pressure is growing after Riek Machar, a former rebel leader turned deputy president who was fired, became a rebel leader again and has now fought his way back to the vice presidency, failed to appear in Juba as expected on April 18 or 19. (Photo by Carl de Souza/AFP Photo)
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