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.
![](https://7b1de02a7bcf9c1df487-6849f9022b05f72b83236695aa4e9a0a.ssl.cf2.rackcdn.com/uploads/articles/2020/894904/mornings-on-maine-show-clips-041320_p3.jpg)
http://accesswdun.com/article/2022/6/1108289/listen-the-hunt-for-a-kgb-spy-at-the-top-of-the-cia