Every declassified Federal Bureau of Investigation record on unidentified anomalous phenomena, from the 1950 Hottel memo and the Flying Disc Master File through the modern Bronze Ellipsoid case file — all indexed via vault.fbi.gov.
The FBI is the second-most-cited US federal source of UAP-relevant material after the Department of War. Its records fall into three broad eras.
First era — 1947 to roughly 1955. Bureau correspondence on the post-Arnold flying-disc wave, including the 1947 Roswell-related memos, the famous Hoover memorandum on Air Force access to crash-recovery material, and the March 22, 1950 'Hottel memo' — a one-page report from SAC Guy Hottel relaying a third-party claim about three flying discs recovered in New Mexico. The Hottel memo remains the most-downloaded item on the FBI Vault.
Second era — 1955 to ~2010. Routine investigative correspondence, civil-rights-era surveillance of UFO-research organisations (NICAP, APRO, MUFON), and inter-agency liaison with the Air Force on Project Blue Book matters. The Flying Disc Master File covers most of this period.
Third era — modern. Most-cited modern case is the Bronze Ellipsoid file: the FBI's reported September 2023 examination of an unidentified material recovered in connection with a UAP-related investigation. Released via FOIA in partial form.
Where to read the files. Everything declassified is searchable at vault.fbi.gov. The Black Vault hosts higher-resolution mirrors of the most-cited items. Both URLs appear on the events linked from this page.
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Eighteen sections and serials of the FBI Headquarters master investigative case file on 'flying discs,' covering the Roswell era through the late 1960s. Includes Oak Ridge nuclear-facility overflight reports. The largest single PDF in PURSUE is 101 megabytes.
The Trump administration launches PURSUE — the Presidential Unsealing and Reporting System for UAP Encounters — and the Department of War publishes 160 declassified UAP-related files in the first tranche: 117 PDFs, 29 sensor videos, and 14 photographs spanning 1944 to 2026. Secretary of War Pete Hegseth says the goal is 'maximum transparency.'
Newly released FBI 302 interviews and an FBI Lab composite sketch describe an ellipsoid bronze metallic object, 130-195 feet in length, that materialized out of a bright light, was observed by multiple credentialed witnesses at a U.S. test site, and disappeared instantaneously.
FBI Detroit field office investigative files 100-DE-26505 and 100-DE-18221, covering early-Cold-War flying disc and UFO reports across Michigan and the Great Lakes region. Released by the Department of War in PURSUE Release 01.
Non-fiction titles by named witnesses, Pentagon insiders, and investigative journalists referenced in this archive.
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U.S. material is the single largest body in the public UAP record, but it isn't the only one. France's GEIPAN has run a transparent case database since 1977; the UK MoD released ~60,000 pages between 2008 and 2017; Japan's evolving track is the program currently moving fastest in 2026. Every state-run UAP-investigation body with a public archive — fifteen countries to date — is catalogued in one place.
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