Maj. John Smyrski, Air Mobility Command Test and Evaluation Squadron test director, observes 9th Airlift Squadron aircrew members during a 358 Quick Don Demist oxygen mask training flight, June 15, 2021. The 9th AS aircrew tested mask modifications for AMC’s test and evaluation team which will assist in determining further modifications. (U.S. Air Force photo by Senior Airman Faith Schaefer)
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