This Sunday, Aug. 17, 2014 photo provided by the anti-government activist group Aleppo Media Center (AMC), which has been authenticated based on its contents and other AP reporting, shows a Free Syrian Army fighter aiming his weapon during a battle with Islamic State militants in Aleppo, Syria. Members of the Islamic State group have been marching in the northern province of Aleppo capturing areas under the control of the mainstream Free Syrian Army. Islamic State fighters have overrun nearly a dozen towns and villages in Aleppo province last week crushing what little resistance they have encountered. (AP Photo/Aleppo Media Center AMC)
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