How the U.S. ignored corruption within the Afghan government

As the Taliban faces protests and dissent across Afghanistan, William Brangham explores the collapse of the country's government — built and supported by the U.S. and allies for 20 years. For a deeper perspective, Brangham speaks with Sarah Chayes, who covered the fall of the Taliban after 9/11 for NPR and served as advisor to several senior U.S. military commanders in Afghanistan.