The Vela Incident of 1979 refers to an unexplained double flash of light detected by US military satellite in the Southern Ocean in the middle of a storm. Information about the incident is partially classified by the US government who offer the explanation that a micro-meteorite struck the satellite and interfered with the camera, while others argue it was an undeclared nuclear test likely carried out by Israel and South Africa.
Incident
Suspects
Israel
See Also: Mordechai Vanunu
Considering Israel's official policy of nuclear ambiguity - neither confirming nor denying the existence of nuclear weapons in Israel, close relationship with South Africa and other argument it is the main suspect behind the incident.