Who will fill post-IS vacuum in Syria?
A claimant confined itself to exerting complete control over Idlib since it isn't launching attacks on Western countries or Turkey
Hayat Tahrir al-Sham
Extremists start new 'battle of liberation' in Syria
The leader of Hayat Tahrir al-Sham, Hashem al-Sheikh, said in his first video speech that has promised to escalate attacks against the Syrian army with the goal of liberating all of Syria's territory. "We …