U.S. Air Force Staff Sgt. James McFadden, 35th Aircraft Maintenance Squadron dedicated crew chief, finishes off a tire change on an F-16 Fighting Falcon Jan. 8, 2015, Misawa Air Base, Japan. McFadden's duties as a crew chief are extensive and include things like pre- and post-flight inspections, intake inspections and all-around maintenance. (U.S. Air Force photo by Staff Sgt. Derek VanHorn/Released)