In this July 27, 2017 file photo, a U.S.-backed Syrian Democratic Forces fighter, runs as he fires mortars at Islamic State group militant, in Raqqa, northeast Syria. The Syrian Democratic Forces said in a statement Wednesday, September 20, 2017, that the battle for the Islamic State group's de-facto capital, Raqqa, has reached its “final stages” with the opening of a new front. (Photo by Hussein Malla/AP Photo)
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