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A directed energy (DE) system turret is positioned on a sting in the 4-foot transonic wind tunnel at Arnold Air Force Base for testing by the Aerodynamics Test Branch of Arnold Engineering Development Complex, March 5, 2021. Wind tunnel testing allows system developers to see the impact of airflow disturbances on the DE beam. (U.S. Air Force photo by Jill Pickett)
24.0-70.0 mm f/2.8
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