After 20 years in Afghanistan, America's "forever war" ended on August 30, but the exit was far from smooth. Weeks before the US withdrawal deadline, the Taliban seized control of the country, prompting tens of thousands to flee. Scenes of chaos and desperation at Kabul airport brought harsh criticism of the Biden Administration's handling of evacuations. How did things go so wrong? And what's next for the nation? Richard Fontaine shares his take on the future of Afghanistan under the Taliban.