An F-35A Lightning II flies by a prototype threat emitter Jan. 17, 2020, at Luke Air Force Base, Ariz. The prototype, which was entered as a submission for the Air Force’s Spark Tank competition, was designed as a low-cost threat emitter system to be used in training for fifth-generation aircraft. The project, designed by two 56th Operations Support Squadron Airmen and an Arizona State University student, is a finalist in the third annual competition. (U.S. Air Force photo by Airman 1st Class Leala Marquez)
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