The Islamist militant group ISIS declared Sunday that it is establishing a caliphate, or Islamic state, within the territories it controls in Iraq and Syria. The word is evocative of the rise of Islam during the Middle Ages when the Prophet Muhammad’s followers conquered large swathes of territory. We’ll discuss ISIS’s latest move and how it might impact the region.
Richard Barrett, former director of global counterterrorism operation for Britain's MI6
Aaron Zelin, Richard Borow fellow at the Washington Institute