Rep. John Rose, of Tennessee, listens to Lt. Col. Lane Haubelt, chief of the Propulsion Test Branch, Test Division, Arnold Engineering Development Complex (AEDC), speak about the engine test capabilities the branch operates during the representative's visit to Arnold Air Force Base, Tenn., headquarters of AEDC, Aug. 31, 2021. Across the test cells on the base, the branch can support test and evaluation of performance, operability, aeromechanical, icing, corrosion, inlet pressure and temperature distortion, accelerated mission testing, engine-inlet dynamics, mission simulations and engine component testing. (U.S. Air Force photo by Jill Pickett)