(right to left) Col. Matthew Caspers, 412th Test Wing vice commander, and Maj. Gen. Evan C. Dertien, Air Force Test Center commander, walk with Gen. Mark D. Kelly, Air Combat Command commander, as he prepares to depart Edwards Air Force Base, Calif., Dec. 8, 2022. During his visit, Kelly stopped at the 417th and 31st Test and Evaluation Squadrons for mission updates and to recognize outstanding performers. ACC,Kelly,

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