Staff Sgt. Alexander Stansbury, 455th Expeditionary Medical Group, bioenvironmental equipment technician, resets a circuit breaker, Bagram Airfield, Afghanistan, July 18, 2016. Breakers must be reset when the blower switch assembly doesn’t start up correctly. The blower is an essential part of the Expeditionary Deployable Oxygen Concentration System, allowing the system to generate oxygen provided to patients at the Join-Craig Theater Hospital. ( Air Force photo by Senior Airman Justyn M. Freeman)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
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