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No needless details, on the point - The complete story of one of the Cold War's most audacious spy operations. In 1954, the CIA and MI6 dug a secret tunnel beneath divided Berlin to tap Soviet military communication cables. For nearly a year, the West intercepted thousands of intelligence messages from the heart of the enemy. There was just one problem: the Soviets knew about it from day one. This essential summary cuts through the jargon, the detours, and the filler — and delivers only what matters. The full story, sharp and complete.