U.S. Air Force Staff Sgt. Ian Ivey, 27th Aircraft Maintenance Unit dedicated crew chief, performs a pre-flight inspection of an F-22A Raptor at Joint Base Langley-Eustis, Virginia, Feb. 14, 2018. Dedicated crew chiefs are responsible for all work that needs to be accomplished on their assigned aircraft and ensuring the aircraft is ready for flight. (U.S. Air Force photo by Senior Airman Derek Seifert)