FBI's Twenty-Year UFO Investigation, Section 3

Brief

This FBI file covers over two decades of UFO-related case activity, drawing on eyewitness testimonies, public reports, and on-site photographic documentation — with Oak Ridge, Tennessee noted as a specific location of interest. The records include technical proposals related to potential propulsion systems and materials from civilian researchers and convention programs, suggesting the Bureau tracked both the physical and organizational dimensions of the phenomenon. The file was partially available on the FBI Vault in a more heavily redacted form; this release contains several newly declassified pages with only minor redactions. No OCR text was extractable from the scanned PDF, so all quotes are withheld.

Metadata

Agency

FBI

Release

5/8/26

Type

PDF • .pdf

Length

190 pages

Classification

UNCLASSIFIED

Tags

flying disc, UAP, photographic evidence, Oak Ridge TN, nuclear site proximity, 1947-1968, propulsion proposals, 62-HQ-83894

Most interesting

• The case file spans 21 years of Bureau activity — from the first major American 'flying disc' wave in June 1947 through July 1968, bracketing the entire classical UFO era.
• Oak Ridge, Tennessee — a primary U.S. nuclear weapons production site — appears explicitly as a location where photographic evidence was collected, placing the phenomenon in direct proximity to classified nuclear infrastructure.
• The file contains technical proposals regarding potential propulsion systems, indicating that at some point the Bureau documented or received analysis going beyond mere sighting reports.
• Researcher accounts and convention programs are included, showing the FBI tracked civilian UFO investigation networks as part of the same case file used for formal incident reports.
• A version of this file has been publicly available on the FBI Vault but with heavier redactions and missing pages; this disclosure represents the most complete release to date.