57°36′N 155°42′E / 57.6°N 155.7°E / 57.6; 155.7
Operation Ivy Bells was a 1971 joint United States Navy, Central Intelligence Agency (CIA), and National Security Agency (NSA) mission whose objective was to place wire taps on Soviet underwater communication lines during the Cold War.
The operation was discovered by the Soviet Union in 1980, when NSA analyst Ronald Pelton defected and revealed the existence of the program.