Airman 1st Class Justin Wanke, a 67th Air Maintenance Unit electricity and environmental specialist, helps conduct a cabin pressure test on an F-15E Strike Eagle, Jan. 8, 2016, on the flightline at Kadena Air Base, Japan. Cabin pressure tests are conducted to prevent hypoxia, a lack of oxygen reaching muscle tissue, from occurring in pilots. (U.S. Air Force photo/Airman 1st Class Nick Emerick)