Astral Knight
U.S. Air Force Senior Airman Ryan Kane, 552nd Aircraft Maintenance Squadron crew chief, stands in front of a Boeing E-3 Sentry aircraft on a flightline at Ramstein Air Base, Germany, Sept. 24, 2020. Kane was on stand-by awaiting a liquid nitrogen system to work on the Boeing E-3 Sentry aircraft’s life support system. The E-3 Sentry came to Ramstein to participate in exercise Astral Knight 20. AK20 consisted of multinational integrated air and missile defense assets performing regional ballistic missile defense (BMD) against constructive threats. (U.S. Air Force photo by Senior Airman Milton Hamilton)