Staff Sgt. James Hughes, 455th Expeditionary Medical Group, biomedical equipment technician, turns the knob on an oxygen tank, Bagram Airfield, Afghanistan, July 18, 2016. Tanks are opened upon delivery, to ensure full potential of medical oxygen is released. Senior Airman Justyn M. Freeman)

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Size: 1870px × 1336px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

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