U.S. Air Force Airman Quentavious Gray, right, and Airman 1st Class Leslie Bynoe, 60th Maintenance Squadron electrical and environmental apprentices, connect a liquid nitrogen probe coupling assembly at Travis Air Force Base, California, March 28, 2024. The test was performed to identify any leaks of liquid nitrogen, used for aircraft fire suppression, in the system. (U.S. Air Force photo by Senior Airman Alexander Merchak)
