Airman 1st Class Matthew Zullo, 2nd Maintenance Squadron electrical and environmental systems specialist, inspects a liquid oxygen tank at Barksdale Air Force Base, La., Oct. 30, 2018. The tanks must be purged of contaminants using a process involving hot air before they are refilled with liquid oxygen for B-52 Stratofortress aircrews to have breathable air while in high altitudes.

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Size: 1732px × 1155px
Photo credit: © David Wa / Alamy / Afripics
License: Licensed
Model Released: No

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