Senior Airman Donte Hatcher, 379th Expeditionary Logistics Readiness Squadron fuels cryogenic operator, takes a sample from a liquid oxygen tank to ensure its safety during an inspection Aug. 5, 2016, at Al Udeid Air Base, Qatar. Taking a sample of the liquid oxygen is one way Hatcher ensures the product is percent pure or higher, which allows aircrew to accomplish their missions safely. Senior Airman Janelle Patiño

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Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
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