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Fighters loyal to Al-Qaeda's Syrian affiliate and its allies pray outside the building of Idlib Governorate on March 28, 2015 in the northwestern Syrian city of Idlib . A coalition made up of Al-Nusra Front, the official Syrian affiliate of Al-Qaeda, and several Islamist factions seized the city of Idlib, only the second provincial capital to be lost by the regime in more than four years of war. AFP PHOTO / SAMI ALI (Photo credit should read Sami Ali/AFP/Getty Images)

Fighters loyal to Al-Qaeda's Syrian affiliate and its allies pray outside the building of Idlib Governorate on March 28, 2015 in the northwestern Syrian city of Idlib . A coalition made up of Al-Nusra Front, the official Syrian affiliate of Al-Qaeda, and several Islamist factions seized the city of Idlib, only the second provincial capital to be lost by the regime in more than four years of war.  AFP PHOTO / SAMI ALI        (Photo credit should read Sami Ali/AFP/Getty Images)