On Friday, in the midst of the effort to evacuate thousands of people from Kabul, two suicide bombers attacked the Kabul airport, killing about 160 people. A jihadi group ISIS Khorasan, or ISIS-K, claimed responsibility. Who are these extremists? And how do they impact the Taliban’s plans to govern after the U.S. completely pulls out of Afghanistan?  Guest: Colin Clarke, a Senior Research Fellow at the Soufan Center and the author of After the Caliphate: The Islamic State & the Future Terrorist Diaspora. If you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get benefits like zero ads on any Slate podcast, bonus episodes of shows like Slow Burn and Dear Prudence—and you’ll be supporting the work we do here on What Next. Sign up now at slate.com/whatnextplus to help support our work. Learn more about your ad choices. Visit megaphone.fm/adchoices