The whole truth about the mysterious TR-3B Flying Triangle that appeared in the world skies Part 1

Black triangles are a class of unidentified flying objects (UFOs), with certain common features, which have reportedly been observed from the 1940s to the present. Reports of black triangles generally originate from the United States and Britain, Reports generally describe this class of UFOs as enormous. silent, black triangular crafts hovering or slowly cruising at low altitudes over cities and highways, usually at night and making no attempt to evade detection.