Before the Islamic State stormed onto the scene, they were the strongest insurgent group in Syria.<br/> <br />Now, Ahrar al Sham, which means the "Liberators of Damascus" are fighting both the Syrian Army and Islamic State militants.<br/> <br />This week, the group confirmed reports that their leader al-Sheikh Hassan Aboud, seen here, is dead.<br/> <br />A spokesperson says dozens of the group's leaders had gathered in a fortified bunker when there was an explosion. It isn't clear whether an outside party is responsible. Some have speculated a gas attack.<br/> <br />Doctors examining the victims' bodies say they were few external signs of injury, according to images posted to a social media website whose content Reuters cannot independently verify.<br/> <br />The group also announced that Hashim al-Sheikh Abu Jaber will lead the group, along with a new military commander.<br/> <br />While it's too early to know what impact they may have on the fight, what is clear is that the group has no plans to play second fiddl
