Support WBURWhy The Race To Oust ISIS From Deir Ez-Zor In Syria May Present New DangersRuth SherlockSeptember 20, 2017 ShareSmoke rises from buildings in the area of Bughayliyah, on the northern outskirts of Deir ez-Zor on Sept. 13, as Syrian forces advance during their ongoing battle against ISIS. (AFP/Getty Images)
