FILE – In this Wednesday, Nov. 19, 2014 file photo, fighters from the Free Syrian Army, left, and the Kurdish People’s Protection Units (YPG), center, join forces to fight Islamic State group militants in Kobani, Syria. Kurdish fighters backed by intense U.S.-led airstrikes pushed the Islamic State group almost entirely out of the Syrian town of Kobani on Monday, Jan. 26, 2015, marking a major loss for extremists whose hopes for easy victory dissolved into a bloody, costly siege that seems close to ending in defeat. (AP Photo/Jake Simkin, File)