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Robert Hanssen

Robert Philip Hanssen was an American Federal Bureau of Investigation (FBI) agent who spied for Soviet and Russian intelligence services against the United States from 1979 to 2001. His espionage was described by the Department of Justice as "possibly the worst intelligence disaster in U.S. history".
  • Personal 

  • FBI counterintelligence unit, further espionage activities (1985–1991) 

  • Investigation and arrest 

  • Guilty plea and imprisonment 

  • Modus operandi 

  • In the media