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TOPSHOT - Smoke billows from a rebel-held area of Daraa, in southern Syria, following reported shelling by pro-government forces during sunset on January 12, 2017. / AFP / MOHAMAD ABAZEED (Photo credit should read MOHAMAD ABAZEED/AFP/Getty Images)

TOPSHOT - Smoke billows from a rebel-held area of Daraa, in southern Syria, following reported shelling by pro-government forces during sunset on January 12, 2017. / AFP / MOHAMAD ABAZEED        (Photo credit should read MOHAMAD ABAZEED/AFP/Getty Images)