During the Cold War, the world believed the real battle was fought in space, at borders, and in political halls. But deep beneath the icy waters of the North Pacific, a hidden war was unfolding. Codenamed Operation Ivy Bells, this top-secret U.S. Navy and NSA mission aimed to tap a Soviet military communication cable located on the seafloor — without ever being detected.
It required nuclear submarines, elite divers, classified technology, and a level of underwater espionage the world had never seen before. For years, America listened to the USSR’s most sensitive conversations — military plans, submarine movements, intelligence briefings — all thanks to a device quietly attached to a cable thousands of feet underwater.
But every secret has an expiration date. A shocking betrayal would eventually expose Ivy Bells and change the future of intelligence operations forever.
In this video, we explore the mission, the technology, the risks, the espionage, and the dramatic ending of one of the most daring covert operations in U.S. history.
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