Senior Airman William Ferguson, 911th Aircraft Maintenance Squadron crew chief, prepares to service the liquid oxygen of a C-17 Globemaster III at the Pittsburgh International Airport Air Reserve Station, March 21, 2022. Liquid oxygen is routinely serviced to ensure aircrew have breathable oxygen while flying.

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Photo credit: © NB/TRAN / Alamy / Afripics
License: Licensed
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Keywords: 4thaf, afrc, airmanmagazine, dma, dod, usaf