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TAL ABYAD, SYRIA - JUNE 19: (TURKEY OUT) An Islamic State's prison is seen in the picture in Tal Abyad, Syria. June 19, 2015. Kurdish fighters with the YPG took full control of Tal Abyad, dealing a major blow to the Islamic State group's ability to wage war in Syria. Mopping up operations have started to make the town safe for the return of residents from Turkey, after more than a year of Islamic State militants holding control of the town. (Photo by Ahmet Sik/Getty Images)

TAL ABYAD, SYRIA - JUNE 19: (TURKEY OUT) An Islamic State's prison is seen in the picture in Tal Abyad, Syria. June 19, 2015. Kurdish fighters with the YPG took full control of Tal Abyad, dealing a major blow to the Islamic State group's ability to wage war in Syria. Mopping up operations have started to make the town safe for the return of residents from Turkey, after more than a year of Islamic State militants holding control of the town. (Photo by Ahmet Sik/Getty Images)