Ahmed Hussein al-Sharaa, the man who now rules Syria, has gone by multiple names and led a variety of rebel groups to ultimately oust the Assad regime. But who is he? And, after being designated a terrorist, can he gain legitimacy on the international stage and unite the numerous tribal, ethnic and religious groups inside Syria? 

• GUEST: Nicolas Pelham, The Economist’s Middle East correspondent
• PRODUCER: Catherine Zengerer
• The great pretender: how Ahmed al-Sharaa won Syria