For years, American citizen Ana Montes was a go-to contact for Cuban intelligence within the Defense Intelligence Agency. A reliable employee with a deep knowledge of one of the country's top adversaries, she was a valuable asset within the department, or so they thought. In reality, Montes had been working as a Cuban spy, retrieving and leaking key pieces of classified information.

Retired FBI Special Agent Peter Lapp worked on the team that investigated and arrested Montes. He discusses the components of this urgent investigation, as detailed in his book, Queen of Cuba.

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