U.S. Air Force Maj. Jeffrey Hansen, 137th Combat Training Flight director of operations, Oklahoma Air National Guard uses a red light to examine a pair of AN/PVS-31A binocular night vision goggles during Mission Sustainment Team (MST) training in Oklahoma City, Feb. 10, 2022. The MST students used the night vision devices to learn how to observe their surroundings as well as conceal their movement in the dark. (U.S. Air National Guard photo by Tech. Sgt. Brigette Waltermire)
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