Syrian People's Protection Units (YPG) members in a tank in frontline of Raqqa, on January 7, 2016 fight against the Daesh. (Photo by Jacob Simkin/NurPhoto via Getty Images)
Syrian People's Protection Units (YPG) members in a tank in frontline of Raqqa, on January 7, 2016 fight against the Daesh. (Photo by Jacob Simkin/NurPhoto via Getty Images)