From Wikipedia: Operation Opera, also known as Operation Babylon was a surprise Israeli air strike carried out on 7 June 1981, that destroyed a nuclear reactor under construction 17 kilometers southeast of Baghdad, Iraq. In 1976, Iraq purchased an "Osiris"-class nuclear reactor from France. While Iraq and France maintained that the reactor, named Osirak by the French, was intended for peaceful scientific research, the Israelis viewed the reactor with suspicion, and said that it was designed to make nuclear weapons. On 7 June 1981, a flight of Israeli Air Force F-16A fighter aircraft, with an escort of F-15As, bombed and heavily damaged the Osirak reactor. Israel claimed it acted in self-defense, and that the reactor had "less than a month to go" before "it might have become critical."