UFO Magazine
An explanation for the UFO known as the “Black Triangle” may have been found. From 1982 to 1985 researchers from the Defense Advanced Research Projects Agency (DARPA) and NASA revived the notion of the Trans-Atmospheric Vehicle (TAV). This project became known as Copper Canyon. The objective was to find a replacement for the Lockheed SR-71 Blackbird which was retired from service in 1989. This was also around the time of the first “triangle” sightings.
From the numerous eye-witness reports of the triangle it became obvious that the vehicle is hypersonic rather than supersonic, as was the SR-71. The SR-71 was very capable of a Mach 3.5+ performance, and given the many advances in American military technology since the SR-71 was designed, it isn’t unreasonable to assume that an aircraft capable of a Mach 5+ performance has been developed. However, the SR-71 was returned to service in 1996. It’s replacement may have been the Advanced Stealth Technology Reconnaissance Aircraft (ASTRA), which has often been referred to, mistakenly, as Aurora.
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