Team tests concept demonstrator
Staff Sgt. Steven Schrader (left) and Staff Sgt. Alex Rini, 412th Logistics Test Squadron, discuss the progress of the C-17 portion of the Hybrid Electric Flightline Cart Technology Pathfinder tests. The nearly zero noise of the HEF allows maintainers to converse without the use of the aircraft’s internal communication system. (U.S. Air Force photo by Christopher Ball)

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Photo by: Christopher Ball |  VIRIN: 170214-F-IS743-001.JPG