Air Force Airman 1st Class Austin Wesson, 733rd Logistics Readiness Squadron fuels distribution operator, and James Baldwin, 733rd LRS fuels facilities fuels distribution systems operator, fill a liquid oxygen cart at Joint Base Langley-Eustis, Va., April 7, 2017. Every 90 days a sample of liquid oxygen has to be taken and sent to lab for inspection at Wright Patterson Air Force Base, Ohio, to ensure it is at least percent pure. ( Air Force photo/Staff Sgt. Areca T. Bell)

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Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

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