Smoke rises over Sinjar, northern Iraq from oil fires set by Islamic State militants as Kurdish Iraqi fighters, backed by U.S.-led airstrikes, launch a major assault on Thursday, Nov. 12, 2015. The strategic town of Sinjar was overran last year by the Islamic State group in an onslaught that caused the flight of tens of thousands of Yazidis and first prompted the United States to launch the air campaign against the militants. (AP Photo/Bram Janssen)
