Air Force Senior Airman Tannin Aguiar, a non-destructive inspection technician at the 173rd Fighter Wing in Klamath Falls, Ore., takes an oil sample from one of the F-15 engines during temporary duty to Tucson, Ariz., Jan. 21, 2020. The wing brought five F-15 aircraft and nearly 90 people to help the 162nd Fighter Wing in Tucson, Ariz., train fledgling F-16 pilots for two weeks. ( Air National Guard photo by Master Sgt. Jefferson Thompson)

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Photo credit: © Operation 2021 / Alamy / Afripics
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