June 8, 1967 was the worst day in the history of the National Security Agency. On that date, Israeli airplanes and torpedo boats mauled and nearly sank an American spy ship in international waters, killing or maiming most of its crew. This tragedy appears as a footnote to Israelis, an unpleasant sideshow of their victorious Six Day War, while official Washington preferred the embarrassing episode be forgotten. But NSA has never let the Liberty and her ill-fated crew disappear from memory altogether.