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Counterintelligence: Operation Lemon Aid

Counterintelligence can be described as activities designed to prevent or thwart spying, intelligence gathering, and sabotage by an enemy or other foreign entity. This guide provides books, articles, reports, websites, and videos on the subject.

Operation Lemon Aid

Operation Lemon Aid-- an induced double agent operation-- was conceived, controlled, and concluded as a cooperative counterintelligence effort by the FBI and U.S. Naval Investigative Service (NIS).  Two Soviet employees of the UN Secretariat, Valdik Enger and Rudolf Chernyayev, were arrested for accepting classified information from Navy Lieutenant Commander Art Lindberg, who was acting as a double agent for the United States.  In 1978, Enger and Chernyayev were convicted of espionage and sentenced to 50 years in prison.



Video-- OPERATION LEMON AID: FBI's First Ever Russian Spy Operation

This video takes you behind the scenes of one of the most daring undercover operations in history-- Operation Lemon Aid.


Online Resources