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Helen Fry talks about an ingenious British intelligence operation to bug German prisoners during the Second World War

Podcast Website Large Helen Fry - WWII Intelligence

Author and historian Helen Fry talks about her new book, The Walls Have Ears, which describes an ingenious British intelligence operation to bug German prisoners during the Second World War

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30th June 1963: Some of the many hundreds of supporters of the CND (Campaign for Nuclear Disarmament) and the Committee of 100 waiting outside Birch Grove, the country home of British prime minister Harold Macmillan, where he and American president John F Kennedy are having weekend talks. (Photo by Kent Gavin/Keystone/Getty Images)
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