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. (U.S. Air Force photo by Senior Airman Justyn M. Freeman)
<br>Unit: 455th Air Expeditionary Wing
Senior Airman Justyn Freeman
Taken on 18 July 2016
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