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This release concerns the FBI investigation of the Weather Underground Organization, the radical group that emerged from Students for a Democratic Society's Weatherman faction and carried out bombings and other clandestine actions in the 1970s. The usable pages are a 1977 Bureau summary and related administrative material, including enclosures sent to field offices and source-location pages tied to Chicago, New York, and San Francisco file references. The summary treats the group as a Marxist-Leninist armed-struggle organization and focuses on whether its politics, travel, and contacts reflected foreign influence, especially from Cuba, North Vietnam, the Provisional Revolutionary Government, and Havana-linked networks such as the Venceremos Brigade. It discusses the Capitol bombing and Weather Underground communiques as evidence of an international revolutionary identity, while the index pages list informant or source references with many details withheld.

FBI file number: CG 100-40903 | Documents span: 1977 | Released in 6 parts
Names in this file: Whittaker Chambers
Subjects: Weather Underground, domestic terrorism, radical politics, bombings, foreign influence, Cuba