Crew chiefs assigned to the 801st Special Operations Aircraft Maintenance Squadron perform routine maintenance on a CV-22 Osprey tiltrotor aircraft at Hurlburt Field, Fla., Jan. 9, 2017. Crew chiefs supervise and coordinate care of their aircraft, such as detailed inspections, diagnosing malfunctions, replacing components and day-to-day maintenance. (U.S. Air Force photo by Staff Sgt. Christopher Callaway)