Today in 1979, an unidentified double flash of light was detected near the Prince Edwards Islands. The flashes were picked up by the U.S. satellite Vela 5B, which was designed to identify nuclear detonations. For years there was speculation about what could have caused the anomaly, including theories about magnetospheric events and, of course, aliens. Although some information on the event remains classified to this day, most recent studies suggest that is was a nuclear weapons test carried out by Israel.