The Latest on the developments related to Syria’s civil war and the expected push against the Islamic State group’s main stronghold of Raqqa in northern Syria : U.S.-backed Syrian Kurdish forces say they have enough fighters to take the Islamic State group’s de facto capital of Raqqa in northern Syria. The spokeswoman for the Syrian Democratic Forces said on Friday that their numbers are increasing, with residents of areas newly liberated from IS joining the ethnically mixed force.