Live updates: Biden vows retribution after U.S. service members were killed in Afghanistan bombing

Marine Gen. Kenneth F. McKenzie Jr., chief of U.S. Central Command, said that after an explosion at the airport’s Abbey Gate, where Americans were searching potential Afghan evacuees, gunmen opened fire. Another blast later occurred at a hotel outside the airport. He attributed the attack to the Islamic State, which claimed responsibility, and indicated that U.S. military action in response is possible.