Mr. Larry Preston (left), Engineer for Hydraulic Testing, instructs students with the North Carolina Air National Guard, 145th Maintenance Group during a two day training course on the new Universal Hydraulic Test Stand that is replacing legacy test stand systems throughout the Air Force. ( Air National Guard photo by Staff Sgt. Paul J. Porter/Released)

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Size: 3936px × 2624px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

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