Review of the FBI's Performance in Deterring, Detecting, and Investigating the Espionage Activities of Robert Philip Hanssen August 14, 2003 Office of the Inspector General -------------------------------------------------------------------------------- UNCLASSIFIED EXECUTIVE SUMMARY I. Introduction In this report, the Office of the Inspector General (OIG) of the Department of Justice (DOJ) examines the performance of the Federal Bureau of Investigation (FBI) in deterring, detecting, and investigating the espionage of Robert Philip Hanssen, a former FBI Supervisory Special Agent. Hanssen's espionage began in November 1979 - three years after he joined the FBI - and continued intermittently until his arrest in February 2001, just two...