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JARABLUS, SYRIA - AUGUST 31: A boy wearing soldiers camouflage uniforms rides a bike as he flashes V-sign in the border town of Jarablus, August 31, 2016, Syria. Turkish troops and Turkey-backed rebels have been fighting Kurdish-led forces and IS since Turkey's incursion into Syria on Aug. 24. with the swift capture of Jarablus, a town a few km inside Syria that was held by Islamic State. (Photo by Defne Karadeniz/Getty Images)

JARABLUS, SYRIA - AUGUST 31: A boy wearing soldiers camouflage uniforms rides a bike as he flashes V-sign in the border town of Jarablus, August 31, 2016, Syria. Turkish troops and Turkey-backed rebels have been fighting Kurdish-led forces and IS since Turkey's incursion into Syria on Aug. 24. with the swift capture of Jarablus, a town a few km inside Syria that was held by Islamic State. (Photo by Defne Karadeniz/Getty Images)