Syria: Who are Hayat Tahrir al-Sham, the rebels seizing control of Aleppo? BBC.comThe illusion of Assad’s grip on Syria shatters, as Russia, Iran and Hezbollah let their guard down CNNSyria Rebels Take Aleppo Airport and Attack Hama, Officials and a Monitor Say The New York TimesLive Briefing: Syrian rebels advance after wresting control of most of Aleppo The Washington PostIslamist rebels in Syria catch Assad, Putin, Iran regimes off guard giving US new mideast headache Fox News