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Chief opposition negotiator Mohammad Alloush of the Jaish al-Islam (Army of Islam) rebel group attends the first session of Syria peace talks at Astana's Rixos President Hotel on January 23, 2017. / AFP / Kirill KUDRYAVTSEV (Photo credit should read KIRILL KUDRYAVTSEV/AFP/Getty Images)

Chief opposition negotiator Mohammad Alloush of the Jaish al-Islam (Army of Islam) rebel group attends the first session of Syria peace talks at Astana's Rixos President Hotel on January 23, 2017. / AFP / Kirill KUDRYAVTSEV        (Photo credit should read KIRILL KUDRYAVTSEV/AFP/Getty Images)