Nuclear espionage
In 1986, Mordechai Vanunu, who had worked at a nuclear facility in Israel, gave  information about Israel's nuclear weapons program to the British press. People had thought before that Israel had an advanced and secretive nuclear weapons program and collection, but now they knew for sure. Israel has never said that it does or does not have a nuclear weapons program, and Vanunu was kidnapped and smuggled to Israel, where he was convicted of treason and espionage.