Syrian oppositions take positions to fight against the Islamic State [Getty Images]

ALEPPO, SYRIA - AUGUST 18: Members of Syrian Islamic Front and Syrian opposition Mujahidin Brigade members guard to fight against the Islamic State (IS), formerly known Islamic State of Iraq and the Levant (ISIL) ,in Mari village, Aleppo, Syria on August 18, 2014. (Photo by Ahmed Hasan Ubeyd/Anadolu Agency/Getty Images)

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