Staff Sgt. Brandon Thomas-Volkov, 494th Aircraft Maintenance Unit dedicated crew chief, tightens bolts to the underside of an F-15E Strike Eagle at Royal Air Force Lakenheath, England, Jan. 5, 2021. Dedicated Crew Chiefs are responsible for managing and supervising all maintenance on their respective aircraft by coordinating with other maintenance specialties such as propulsion, hydraulics and fuels to ensure the aircraft is operational in a timely manner. (U.S. Air Force photo by Senior Airman Madeline Herzog)