Dedicated Crew Chief Ceremony
                        
                        
                        Senior Master Sgt. Preston Gallegos, 37th Aircraft Maintenance Unit superintendent, recites the crew chief oath at Ellsworth Air Force Base, S.D., April 22, 2022. Dedicated crew chiefs are the top performers of the crew chief section and are required to maintain and exceed levels of excellence. (U.S. Air Force photo by Senior Airman Michael Ward)