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Kellye Dooley, a test engineer with the Space Test Branch of Arnold Engineering Development Complex (AEDC), speaks about the 12-foot vacuum chamber with Maj. Gen. Evan Dertien, commander, Air Force Test Center, during Dertien's visit to Arnold Air Force Base, headquarters of AEDC, Oct. 13, 2021. (U.S. Air Force photo by Jill Pickett)
24.0-70.0 mm f/2.8
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