509th MXS tests HVAC systems for B-2 Spirit fleet
Alan Wendel, chief research technician, University of Dayton Research Institute, closes an air valve in order to create back pressure while testing a potential HVAC system for the B-2, on July 18, 2019, at Whiteman Air Force Base, Missouri. Whiteman AFB hosted seven organizations that include aircraft and equipment program offices, the Air Force Material Command, and the Air Force Research Lab to evaluate aircraft cooling options. (U.S. Air Force photo by Senior Airman Thomas Barley)