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From right, Joshua Cooke, an Air Force senior utility manager at Arnold Air Force Base, speaks about the water utility system for the base with Maj. Gen. Evan Dertien, commander, Air Force Test Center, during Dertien's visit to Arnold Air Force Base, Oct. 14, 2021. (U.S. Air Force photo by Jill Pickett) (This image has been altered by obscuring posters for security reasons.)
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