341st OMRS, 819th RED HORSE conduct final swipe on density gauge
Staff Sgt. Justin Williams, 341st Operational Medical Readiness Squadron NCO in charge of occupational health and safety, demonstrates a radiation swipe test on a density gauge April 6, 2021, at Malmstrom Air Force Base, Mont. The gauges are the last of their type in the Air Force and are being phased out for their modern counterparts. (U.S. Air Force photo by Senior Airman Tristan Truesdell)

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Photo by: Senior Airman Tristan Truesdell |  VIRIN: 210406-F-BG120-0018.JPG