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TOPSHOT - Syrian men mourn over the body of a relative at a makeshift hospital in the rebel-held town of Douma, on the eastern outskirts of Damascus, following reported air strikes on December 29, 2016. / AFP / Abd Doumany (Photo credit should read ABD DOUMANY/AFP/Getty Images)

TOPSHOT - Syrian men mourn over the body of a relative at a makeshift hospital in the rebel-held town of Douma, on the eastern outskirts of Damascus, following reported air strikes on December 29, 2016.  / AFP / Abd Doumany        (Photo credit should read ABD DOUMANY/AFP/Getty Images)