MCCONNELL AIR FORCE BASE, Kan. --
Airman Brandon Duncan, 22nd Aircraft Maintenance Squadron crew chief, observes an hourly post-flight inspection of a KC-135 Stratotanker Feb. 12, 2020, at McConnell Air Force Base, Kansas. The aircraft’s wires, lubrication and fluids are investigated every 60 days for discrepancies. (U.S. Air Force photo by Senior Airman Alan Ricker)