Blast from the past. Vela Incident...

via Wikipedia.

The Vela Incident, also known as the South Atlantic Flash, was an unidentified "double flash" of light detected by an American Vela Hotel satellite on 22 September 1979, near the Prince Edward Islands off Antarctica. The most common theory among those who believe the flash was of nuclear origin is that it resulted from a joint South African–Israeli nuclear test.[1][2][3][4] The topic has been highly disputed. In 2016 researchers from George Washington University's National Security Archive noted that the debate over the South Atlantic flash has shifted over the last few years to the side of a man-made weapon test.[5][6]

While a "double flash" signal is characteristic of a nuclear weapons test in the atmosphere, the signal could also have been a spurious electronic signal generated by an ageing detector in an old satellite,[citation needed] or a meteoroid hitting the Vela satellite. No corroboration of an explosion, such as the presence of nuclear byproducts in the air, was ever identified.[citation needed] Results from numerous passes in the area by Boeing WC-135s,[when?] planes designed by the United States Air Force to detect airborne radioactive dust, were negative. Other examiners of the data, including the Defense Intelligence Agency (DIA), the United States Naval Research Laboratory (NRL) and defense contractors, have come to the conclusion that the flash was not a result of a nuclear detonation. Of the previous 41 double flashes the Vela satellites had detected all were subsequently confirmed to be nuclear explosions.[7][8][9] Portions of the information about the event remain classified.[5]

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Will we ever know the truth?