Crew chiefs with the 1st Special Operations Aircraft Maintenance Squadron head out to their assigned aircraft to perform maintenance at Hurlburt Field, Fla., Dec. 15, 2015. Crew chiefs with the 4th Aircraft Maintenance Unit are trained to diagnose malfunctions on the AC-130U Spooky Gunship during pre-flight and post-flight inspections, repair and refuel the aircraft, keep detailed records, marshal aircraft, to remain mission ready at all times.(U.S. Air Force photo by Senior Airman Meagan Schutter)