Staff Sgt. Zachary Rumke, 66th Training Squadron Detachment 1 Arctic Survival School instructor, tests an F-35A Lightning II survival-gear kit in Fairbanks, Alaska, Nov. 5, 2019. Rumke sat in minus 65 degree temperatures for six hours to test the new gear that could be used to protect F-35 pilots from subzero temperatures in the event of an ejection. Editor's note: A small section of the image was blurred to remove implied endorsement. (U.S. Air Force photo by Senior Airman Beaux Hebert)