DEREK, SYRIA - NOVEMBER 13:  Yazidi refugees celebrate news of the liberation of their homeland of Sinjar from ISIL extremists, while at a refugee camp on November 13, 2015 in Derek, Rojava, Syria. Kurdish Peshmerga forces in Iraq say they have retaken Sinjar, with the help of airstrikes from U.S. led coalition warplanes. The Islamic State captured Sinjar in August 2014, killing many and sexually enslaving thousands of Yazidi women.  (Photo by John Moore/Getty Images)