Senior Airman Sean Gregory, 33rd Operations Support Squadron aircrew flight equipment technician, measures a hook blade knife lanyard at Eglin Air Force Base, Fla., Feb. 29, 2016. The knife is worn by pilots as a safety precaution. Should they need to egress from the aircraft for any reason the knife would be used to cut the parachute lines. Flight equipment technicians at the 33rd Fighter Wing have been responsible for over 241 action reports used across the program for the maintenance of F-35 flight equipment and are responsible for providing pilots reliable equipment. (U.S. Air Force photo/Senior Airman Andrea Posey)