200428-F-LC363-1085
Staff Sgt. Melvin D. Branch, 2nd Logistics Readiness Squadron cryogenics NCO in charge, pushes a liquid oxygen tank to be refilled at Barksdale Air Force Base, La., April 28, 2020. The 2nd LRS fuels management flight has the responsibility of ensuring there is an adequate amount of liquid oxygen in the aircraft to combat hypoxia in aircrew. (U.S. Air Force photo by Airman 1st Class Jacob B. Wrightsman)

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Photo by: Airman Jacob Wrightsman |  VIRIN: 200428-F-LC363-1085.JPG