This frame grab from video provided on Monday, Nov. 7, 2016, by the Hawar News Agency, shows U.S.-backed fighters take position during fighting with the Islamic State group in the village of Laqtah, north of Raqqa, Syria. Turkey said Tuesday that Washington has promised that U.S.-backed Syrian Kurdish forces will only be involved in encircling the Islamic State stronghold of Raqqa and will not enter the city itself. (Hawar News Agency, via AP)