Air Force and defense industry representatives involved in the Ground Based Strategic Deterrent program tour one of the arc jet test cells at Arnold Air Force Base, Tenn., April 29, 2021. Arnold Engineering Development Complex, headquartered at Arnold AFB, is preparing to support the GBSD program across the complex. The arc heater facilities will be used to study thermal protection systems. (U.S. Air Force photo by Jill Pickett) (This image has been altered by obscuring badges for security purposes.)
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