Friday March 31st, 2023 5:45AM

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LISTEN: The hunt for a KGB spy at the top of the CIA

At the end of the Cold War, three Americans were caught for spying for the KGB. It is widely believed there was another. Robert Baer chronicles this on-going hunt in his book "The Fourth Man." In his visit on Maine Street, Baer said the FBI is closing in on the culprit.