Flight testing of the Senior Prom vehicles began in October 1978; a total of six aircraft were built, which completed a total of fourteen flights over the duration of the testing programme. The craft were reportedly capable of flying within of a SPS-13 radar without generating a discernible return. Most testing took place at Groom Lake ("Area 51") in Nevada, with a DC-130 Hercules acting as the launch aircraft; there are also reports that some testing was conducted at Edwards Air Force Base in California, with a B-52 Stratofortress being used as the launch platform, while "Hangar 18" at the Groom Lake test complex was reportedly constructed to house the B-52 and Senior Prom combination.