Benjamin Holton, right, section chief of the High-Temperature Materials Characterization and Evaluation capability within the Space and Missile Test Branch, Test Division, Arnold Engineering Development Complex, speaks with Maj. Gen. Christopher Azzano, commander, Air Force Test Center, about the Mid-Pressure Arc Heater, seen in the background, Nov. 10, 2020, during a visit by Azzano to Arnold Air Force Base, Tenn. The MPAH enables the simulation of hypersonic flight conditions for the evaluation of thermal protection systems. (U.S. Air Force photo by Jill Pickett)

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Photo by: Jill Pickett |  VIRIN: 201110-F-KN521-0004.JPG