U.S. Air Force Airman 1st Class Joseph Espinosa, 325th Communications Squadron spectrum manager, holds a portable receiver used to test, identify and eliminate frequency issues for airborne aircraft during Checkered Flag 22-1 at Tyndall Air Force Base, Florida, Nov. 17, 2021. Checkered Flag is a large-force aerial exercise held at Tyndall, which fosters readiness and interoperability through the incorporation of fourth- and fifth-generation aircraft during air-to-air combat training. The 22-1 iteration of the exercise was held Nov. 8-19, 2021. (U.S. Air Force photo by Staff Sgt. Magen M. Reeves)
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