The USS Halibut was no ordinary submarine. In one of the most daring missions of the Cold War, this U.S. spy sub silently infiltrated Soviet waters to steal top-secret intelligence. Known as Operation Ivy Bells, the mission involved tapping a classified Soviet underwater communication cable—without being detected.For years, this act of Cold War espionage gave the U.S. an intelligence advantage, allowing them to intercept Soviet Union secrets straight from the source. But in the world of espionage, no secret stays hidden forever. A shocking betrayal exposed the operation, ending one of the greatest covert missions in history.How did the USS Halibut pull off this near-impossible task? And how did Operation Ivy Bells ultimately fall apart? This is the untold story of one of the most dangerous submarine missions of the Cold War.If you love military history, Cold War espionage, and hidden stories of submarine warfare, make sure to subscribe for more deep dives into the world of Soviet Union secrets and covert operations!