BEIRUT (Reuters) - Islamic State, a Sunni Muslim militant group, has seized a third of Syria and large areas of Iraq and this year proclaimed a caliphate across the two countries in the heart of the Middle East. The group, which U.S-led forces are bombing in Iraq and Syria, is made up of thousands of fighters from both countries as well as foreign recruits from around the world. Its leadership draws from militants with combat experience in Iraq. ...