DAMASCUS, Syria—Islamist rebel leader Abu Mohammed al-Jawlani swapped out his military fatigues for a suit on Monday, positioning himself as a statesman who can unite Syria and responsibly ...

Abu Mohammed al-Jawlani is the leader of Hayat Tahrir al-Sham, one of the largest rebel groups mounting the offensive against the Assad regime. 2. He broke with Islamic State in 2012 and cut ties ...