Calder Walton (@calder_walton), the author of Empire of Secrets: British intelligence, the Cold War, and the Twilight of Empire, sits down with with Aroop Mukharji (@aroopmukharji) to talk about the history of intelligence, Russian espionage, and his favorite secret.

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Subscribe to the podcast: http://hvrd.me/K2K330e5mfD'

More about Calder Walton: https://www.belfercenter.org/person/calder-walton

Belfer Center website: http://www.belfercenter.org

Listen to the full interview: http://hvrd.me/jeMZ30e5mj1