Air Force Tech. Sgt. Zach Vaughan, a crew chief with the 173rd Fighter Wing in Klamath Falls, Ore., communicates with the pilot during start-up procedures during temporary duty in Tucson, Ariz., Jan 17, 2020. The wing brought five F-15 aircraft and nearly 90 people to help the 162nd Fighter Wing train fledgling F-16 pilots for two weeks. ( Air National Guard photo by Master Sgt. Jefferson Thompson)

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