From the Secret Files of J. Edgar Hoover
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During his forty-eight years as director of the Federal Bureau of Investigation, J. Edgar Hoover scrupulously maintained secret office files and arranged for special filing procedures to safeguard "sensitive" information.
Subversive activitiesAnti-communist movementsUnited States. Federal Bureau of InvestigationUnited StatesArchivesInternal securityHistoryMouvements anticommunistesÜberwachungUSASûreté de l'ÉtatAntikommunismus