Amanpour: Roya Rahmani, Lawrence Wilkerson and Joseph Pfeifer

20 years after the 9/11 attacks, Christiane Amanpour speaks with Roya Rahmani, the former Afghan ambassador to the U.S., about what it means to have the Taliban in charge again two decades later. Then, reflecting on her reporting at the time, Christiane talks about the attacks and how we got to where we are. Lawrence Wilkerson, the former Chief of Staff to Secretary of State Colin Powell, discusses America's place in the world today. Hari Sreenivasan talks to Joseph Pfeifer, a retired New York fire department chief, about his extraordinary personal story of that day. 

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