Explore the complex lessons learned from two decades of U.S. involvement in Afghanistan through this insightful panel discussion from the 2021 Aspen Security Forum. Gain valuable perspectives from a distinguished group of experts, including former CIA Director David Petraeus, former Afghan Ambassador to the U.S. Roya Rahmani, former U.S. Ambassador to Afghanistan P. Michael McKinley, and Harvard Professor Meghan O'Sullivan. Moderated by PBS NewsHour's Chief Correspondent Amna Nawaz and introduced by Nicholas Burns of the Aspen Strategy Group, delve into the multifaceted challenges, successes, and implications of America's longest war. Analyze the geopolitical, military, and diplomatic aspects of the conflict, and consider the future of Afghanistan and its impact on global security.