This week, for the first time in more than two years, the directors of the D.N.I., C.I.A., F.B.I., N.S.A., and D.I.A. appeared before Congress to testify about “worldwide threats” to the United States. They discussed Russia, China, Iran, and domestic extremists—and warned about the destabilizing effects of the pandemic and climate change. On the same day, President Biden announced the withdrawal of the final U.S. troops from Afghanistan, closing a twenty-year chapter in the  War on Terror. Susan B. Glasser joins Dorothy Wickenden to discuss the matrix of threats facing the country, and how the Biden Administration is responding to them.