U.S. Drone Strike Kills Ayman al-Zawahri, Top Qaeda Leader. United States International Relations, Drones (Pilotless Planes), Terrorism, Targeted Killings, September 11 (2001), United States Politics and Government, Zawahri, Ayman Al-, AL QAEDA, Kabul (Afghanistan), AFGHANISTAN, Central Intelligence Agency, Taliban, Espionage and Intelligence Services