U.S Air Force Staff Sgt. Daniel Propst, 961st Airborne Air Control Squadron air surveillance officer, checks the oxygen masks onboard an E-3 Sentry before flight April 27, 2020, at Kadena Air Base, Japan. Propst has the distinction of being the first noncommissioned officer in Pacific Air Forces to qualify as an ASO. The ASO position is historically been a rated aircrew commissioned officer only, typically a Captain or a Major. (U.S. Air Force photo by Staff Sgt. Benjamin Sutton)