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TOPSHOT - Syrian children slide down rubble of destroyed a building in the rebel-held city of Daraa, in southwestern Syria on September 12, 2016 as Muslims mark the first day of Eid al-Adha (Feast of the Sacrifice) holiday. / AFP / MOHAMAD ABAZEED (Photo credit should read MOHAMAD ABAZEED/AFP/Getty Images)

TOPSHOT - Syrian children slide down rubble of destroyed a building in the rebel-held city of Daraa, in southwestern Syria on September 12, 2016 as Muslims mark the first day of Eid al-Adha (Feast of the Sacrifice) holiday.  / AFP / MOHAMAD ABAZEED        (Photo credit should read MOHAMAD ABAZEED/AFP/Getty Images)