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Fighters from Al-Qaeda's Syrian affiliate Al-Nusra Front drive in the northern Syrian city of Aleppo flying Islamist flags as they head to a frontline, on May 26, 2015. (Fadi al-Halabi/AFP/Getty Images)

View of the city of Monastir and of the mosque, Monastir Governorate, Tunisia. (DeAgostini/Getty Images)

AK Party Supporters in front of the poster of then-Turkish PM Recep Tayyip Erdogan (R) and then-Turkish Foreign Minister Ahmet Davutoglu (L) in Ankara, Turkey on August 27, 2014. (Murat Kaynak/Anadolu Agency/Getty Images)

Turkey's President Recep Tayyip Erdogan holds a Koran at the opening ceremony of the Selehaddin Eyyubi airport on May 26, 2015, in eastern city of Hakkari. (STR/AFP/Getty Images)

Members of the Egyptian Muslim brotherhood gather in front the party's headquarters in Cairo on March 22, 2013. (KHALED DESOUKI/AFP/Getty Images)

ISIS fighters in Libya (Dabiq Magazine)

Outside a police station in Al-Hawari district of Benghazi, Libya on May 2, 2014. (Mohammed Elshaiky/Anadolu Agency/Getty Images)

(Tareq Saifur Rahman/Getty Images)