After losing its last territory in Syria on March 23, 2019, the Islamic State quickly reclaimed global attention with the Easter bombings in Sri Lanka on April 21 and a video tape of its reclusive leader, Abu Bakr al-Baghdadi, on April 29. The jihadi movement is now shifting focus to its ISIS branches, or “provinces,” in Africa, Asia and Europe. Baghdadi signaled ISIS’s expansion by formally embracing two Sunni extremist groups in Mali and Burkina Faso. But the Islamic State’s human core—more than 100,000 fighters and their families, including children—remains clustered in the rubble of its former “caliphate” in both Syria and Iraq. In Syria, they are detained in makeshift prisons, a hospital and refugee-style camps in the desert of northeastern Syria. USIP Senior Fellow Robin Wright made a rare tour of northeastern Syria to interview men and women who were part of the ISIS caliphate and to assess the risks posed by the post-caliphate crisis.