Tech. Sgt. Robert Knight, 28th Maintenance Squadron aircrew egress system technician, evaluates a harness release cartridge on a training Advanced Concept Ejection Seat II during a quality check in the egress shop on Ellsworth Air Force Base, S.D., June 12, 2012. Knight and other aircrew egress system technicians are responsible for training junior enlisted Airmen on all necessary systems and ensuring their tasks are completed correctly. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)