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How the CIA used manganese to dupe the Soviet Union

The US said it was deep-sea mining. Instead, it was trying to retrieve a Soviet submarine. 大象传媒 Science Editor David Shukman tells Geeta Guru-Murthy about a stunning cold-war ruse.
(Photo: Manganese nodules on the floor of the Pacific Ocean.
Credit: Science Photo Library)

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Duration:

4 minutes