1943–1945
Wartime “foo fighter” reports
Wartime aviators report unusual lights. Later CIA history describes these accounts as predecessors of flying saucer reports, without establishing one shared cause.
Historical UFO investigation methods ↗Reading edition · 8 September 2026
The public record.
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Scandinavian “ghost rockets” reach British intelligence files
British diplomatic and air-intelligence records preserve reports of apparent rockets over Scandinavia. The archive guide identifies the surviving files and describes disagreement about their possible causes.
British government UFO files: research briefing ↗24 June 1947
Kenneth Arnold reports objects near Mount Rainier
Arnold’s account becomes a defining event in the modern flying saucer story. Smithsonian history traces the sighting and publicity; the reported appearance and estimated motion did not establish an identified aircraft or origin.
Kenneth Arnold and the flying saucer era ↗July 1947
Roswell debris enters the public record
Recovered debris prompts military statements. Later investigations distinguish the 1947 material from subsequent occupant allegations; the Air Force eventually attributes the debris to MOGUL.
GAO search for Roswell records ↗Air Force Roswell reports and MOGUL explanation ↗December 1947
Project Sign begins
The Air Force establishes a dedicated effort to collect and assess UFO reports. NARA dates Sign’s beginning to December 1947; the project precedes Grudge and Blue Book in the official investigation sequence.
How Sign, Grudge, and Blue Book developed ↗1949
Project Grudge succeeds Sign
Grudge follows the earlier Sign investigation and continues the Air Force’s handling of UFO reports. The program belongs to the institutional history leading to Blue Book, rather than representing a separately established explanation for every sighting.
How Sign, Grudge, and Blue Book developed ↗Canada authorizes Project Magnet
Transport authorized Wilbert Smith’s part-time research into UFO reports and magnetic propulsion ideas. The historical review records the project’s existence without validating its proposed physical mechanism.
Sky Canada: management of public UAP reporting ↗22 March 1950
The Guy Hottel memorandum
An FBI memorandum repeats claims about recovered saucers and occupants. The Bureau later stresses that the account was indirect and uninvestigated; a genuine memorandum can preserve a claim without verifying what it describes.
Guy Hottel memo: original image and context ↗
August 1950
Britain establishes the Flying Saucer Working Party
An inter-service intelligence group was established to review flying-saucer evidence and British reports. The National Archives guide identifies the minutes and the subsequent report in government files.
British government UFO files: research briefing ↗1952
Tremonton film becomes an investigation case
A family films bright objects over Utah. Military interpreters and the Robertson Panel disagree about their explanation and the need for comparison photography.
Historical UFO investigation methods ↗Project Second Storey coordinates Canadian reporting
The Defence Research Board established a committee on reported flying saucers. It developed a reporting form and met through 1954; it did not conduct individual sighting investigations.
Sky Canada: management of public UAP reporting ↗March 1952
Project Blue Book begins
Blue Book begins the Air Force’s longest-running UFO investigation project. Its surviving case files contain explained reports and cases left unidentified.
How Sign, Grudge, and Blue Book developed ↗Project Blue Book: files, findings, and access ↗19–27 July 1952
Radar reports over Washington
Radar and visual reports around Washington attract military attention. NARA preserves contemporary records; the CIA’s later history discusses the investigations and atmospheric explanation.
Blue Book records of the Washington sighting wave ↗CIA’s role in UFO study, 1947–1990 ↗14–17 January 1953
The Robertson Panel reviews UFO evidence
A CIA-sponsored scientific panel examines selected Air Force cases and considers national security implications. It recommends changes to public education and reporting, placing the episode within Cold War policy as well as the history of scientific investigation.
CIA’s role in UFO study, 1947–1990 ↗31 August 1954
Sea Fury pilot reports lights near Nowra
A naval pilot reported two lights while returning to Nowra. The National Archives describes the pilot’s account and radar-operator confirmation preserved in the historical record.
Australian UFO records and the RAAF ↗August 1955
U-2 testing complicates UFO reporting
The CIA begins testing its high-altitude U-2 aircraft. Its official history describes how unfamiliar flight altitudes and reflected sunlight generated reports, while secrecy constrained explanations. This documents a source of some sightings, not a universal solution.
CIA’s role in UFO study, 1947–1990 ↗15 July 1960
An unidentified light is investigated near Maralinga
Witnesses reported a light near the Wewak test area. The subsequent security report considered several explanations, including a meteor and electrical effects, while acknowledging uncertain distance and identification.
Wewak / Maralinga unidentified-light report ↗December 1961
Avrocar development is cancelled
The experimental disc-shaped Avrocar fails to meet its intended performance, with severe stability problems above ground effect. Its cancellation marks the end of a documented human aircraft project often confused with broader flying saucer stories.
Avrocar: a documented saucer-shaped aircraft ↗1964
Lonnie Zamora’s Socorro report
Lonnie Zamora reports an unusual object near Socorro. CIA history describes the Blue Book investigation as unable to establish its origin.
Historical UFO investigation methods ↗March 1966
Ford presses for congressional examination
Following public concern about UFO reports, Gerald Ford calls for congressional consideration. His surviving press releases and correspondence show how sightings became an oversight question, alongside debate over the adequacy of the Air Force’s investigations.
Gerald Ford’s UFO correspondence and press releases ↗5 April 1966
House examines Air Force UFO investigations
A House hearing considers unidentified flying objects and the government’s investigative response. The official transcript lets readers examine questions and testimony directly, with witnesses’ statements distinguished from later summaries or claims of congressional confirmation.
House hearing on unidentified flying objects ↗7 October 1966
The Colorado study is announced
The Air Force announces an independent university study led by Edward Condon. Correspondence preserved at the Ford Library documents the announcement, while the university’s archive preserves research material gathered during the investigation.
Gerald Ford’s UFO correspondence and press releases ↗The Colorado UFO study and surviving archive ↗9 July 1968
Chile circulates an official reporting request
The meteorological-office initiative sent a circular to forty-three aeronautical installations requesting reports. SEFAA’s institutional history traces its origins to this earlier commission, which operated until 1975.
Chile’s official UAP offices: institutional history ↗29 July 1968
Congress holds a scientific UFO symposium
The House Committee on Science and Astronautics brings scientific perspectives on UFOs into a public symposium. Its transcript preserves the arguments and testimony, giving readers access to the debate rather than a single compressed verdict.
Symposium on unidentified flying objects ↗1968
The Condon study reaches its conclusions
Colorado completes its Air Force-sponsored study. Its conclusions influence Blue Book’s closure, while the university preserves research files beyond the report’s summary.
The Colorado UFO study and surviving archive ↗Blue Book records of the Washington sighting wave ↗Late 1968
National Academy reviews the Colorado study
A National Academy of Sciences panel reviews the Colorado study’s methods and conclusions. This evaluates the study rather than independently reinvestigating all of its underlying UFO reports.
AARO historical record report: Volume I ↗17 December 1969
Blue Book termination is announced
The Air Force announces termination. Its historical tally across 1947–1969 includes 12,618 reports, with 701 unidentified; that classification does not identify extraterrestrial vehicles.
Project Blue Book: files, findings, and access ↗January 1970
Blue Book operations cease
NARA distinguishes the December termination order from the January cessation of activity. The surviving records remain available for historical research.
Blue Book records of the Washington sighting wave ↗19 September 1976
Iranian encounter is recorded by U.S. officials
A U.S. military report preserves information about an encounter reported over Iran. The released record provides a contemporary reporting chain, but its preservation does not independently establish every claimed maneuver or an extraterrestrial explanation.
U.S. report on the 1976 Tehran encounter ↗CNES creates GEPAN
France’s space agency established a group to study unidentified aerospace phenomena. Its institutional successors retained the work of collecting witness accounts, investigating reports, and preserving the material.
GEPAN, SEPRA, and GEIPAN: institutional history ↗21 July 1977
The Carter administration asks NASA to reconsider UFO study
Frank Press asks NASA whether new findings warrant another UFO panel. NASA later declines, a policy decision rather than a new investigation.
AARO historical record report: Volume I ↗NASA’s 1977 chronology and UFO policy discussion ↗October 1978
Frederick Valentich disappears over Bass Strait
A civilian pilot disappeared after reporting a strange object during a night flight. The archive’s historical account distinguishes that report from later speculation about what caused the disappearance.
Australian UFO records and the RAAF ↗31 December 1978
Kaikōura lights are recorded from an aircraft
A television crew filmed lights during a flight along the Kaikōura coast. Surviving government correspondence discusses the footage, radar, and atmospheric conditions; the recording does not independently establish a spacecraft.
Kaikōura lights: Archives New Zealand record ↗Canada introduces CADORS aviation occurrence reporting
Transport Canada launched a system for timely aviation occurrence information. It supplies broader aviation-safety context for examining unusual-observation reports, and its preliminary records may receive updates and corrections.
Civil aviation occurrence records: CADORS ↗1986
Japan Airlines Flight 1628 prompts FAA records
A reported encounter over Alaska produces FAA information releases, now described in the National Archives catalog. The collection is a starting point for examining the crew’s account and associated aviation records without assuming a settled identification.
FAA information releases: Japan Airlines Flight 1628 ↗19 May 1986
Brazil launches fighters after radar and visual reports
Air-defence authorities launched fighters following reports of luminous objects and radar detections. The government’s retrospective describes the response, while the observations and their interpretation remain distinct questions.
The 19 May 1986 Brazilian air-defence response ↗1987
Archivists challenge the provenance of alleged MJ-12 papers
Archivists identify inconsistencies surrounding an alleged MJ-12 memorandum. NARA distinguishes certifying a faithful copy from authenticating the held document or its claims.
Project Blue Book: files, findings, and access ↗SEPRA replaces GEPAN
CNES replaced GEPAN with SEPRA, a service whose name emphasized atmospheric re-entry phenomena. This institutional change belongs to the history of the office, rather than a new sighting.
GEPAN, SEPRA, and GEIPAN: institutional history ↗Spain begins declassifying UFO files
The Defence Ministry began reviewing the classification of UFO files for public consultation. Physical copies were deposited in the Air Force central library the following year, before later digitization.
Spain’s declassified Expedientes OVNI ↗RAAF stops investigating UFO sightings
The National Archives dates the RAAF’s withdrawal from UFO investigations to 1994, describing its assessment that unresolved reports offered little or no apparent security threat. Historical files remain preserved.
Australian UFO records and the RAAF ↗1994
Air Force research attributes Roswell debris to MOGUL
Air Force research attributes the 1947 debris to MOGUL balloon research. The finding concerns recovered material; later body allegations require separate evidence.
Air Force Roswell reports and MOGUL explanation ↗28 July 1995
GAO publishes its Roswell records search
GAO reports on surviving records and gaps in archival holdings relating to Roswell. The inquiry documents what investigators could locate and how records were handled, rather than treating the absence of a document as proof of a hidden craft.
GAO search for Roswell records ↗1997
The Air Force addresses later body allegations
Case Closed examines occupant allegations through later balloon research and other incidents. Their dates matter when assessing retrospective testimony.
Air Force Roswell reports and MOGUL explanation ↗AARO historical record report: Volume I ↗3 October 1997
Chile creates CEFAA
The civil aviation authority established CEFAA following renewed concern about unusual aerial reports. The office brought the subject into an aviation setting with personnel from operational and technical fields.
Chile’s official UAP offices: institutional history ↗British defence intelligence completes its UAP study
The report known as Project Condign examined UAP in the UK Air Defence Region. The archive guide records that DI55 subsequently stopped receiving routinely distributed UFO reports.
British government UFO files: research briefing ↗November 2004
Nimitz encounter and the “Tic Tac” account
Naval aviators report an unusual encounter during training off Southern California. Fravor later provides Congress with his firsthand account, distinguishing his visual encounter from footage obtained on a subsequent flight by another crew.
David Fravor’s account of the 2004 Nimitz encounter ↗GEIPAN adds an explicit public-information mission
Following an audit, CNES restructured the activity as GEIPAN. The additional information mission placed greater emphasis on public communication and the eventual online publication of its case archive.
GEPAN, SEPRA, and GEIPAN: institutional history ↗France begins publishing its UFO archives online
GEIPAN began putting its archives and case files on the public internet. Witness anonymity remained part of the process, and published files included both explained and unresolved observations.
GEPAN, SEPRA, and GEIPAN: institutional history ↗Britain starts its major MOD UFO file transfer
The Ministry of Defence began transferring its remaining UFO records for public access through The National Archives. This staged release program continued over five years and multiple tranches.
British government UFO files: research briefing ↗2008
DIA receives funding for advanced aerospace research
Contemporary DIA briefing material records a 2008 appropriation for research into future aerospace threats. The resulting AAWSAP work includes technical studies; funding and unusual paper topics do not establish recovered vehicles or demonstrated exotic technology.
AAWSAP status briefing ↗24 June 2009
Reid requests special access protection
Harry Reid asks the department to place the aerospace effort under restricted special access protection. The released review package records the request and the department’s finding that this level of protection was not justified.
Reid’s request for special access protection ↗December 2009
The MOD closes its UFO reporting channels
Following a policy review, the MOD closed the dedicated hotline and email address. The later release guide identifies the briefing and correspondence that document the decision and its reasoning.
Final MOD file transfer: 2013 highlights ↗New Zealand publishes Defence Force UFO files
The Defence Force issued copies of its UFO files for public release. The National Library catalogue identifies the publication and its constituent file references for subsequent archival research.
New Zealand Defence Force UFO release catalogue ↗9 August 2010
Brazil formalizes transfer of UFO reports to its archive
Portaria 551/GC3 assigned receipt, cataloguing, copying, and archive-transfer responsibilities for UFO reports. It took effect upon publication the next day and defined an administrative records process.
Portaria 551/GC3: UFO records procedure ↗6 May 2011
Argentina establishes CEFAE
The Argentine Air Force established its commission for studying aerospace phenomena. The later identification centre’s official history dates this predecessor and preserves access to its annual case-resolution publications.
Argentina’s Aerospace Identification Centre ↗2012
AAWSAP is terminated
AARO dates termination of the DIA-funded effort to 2012. Its review distinguishes AAWSAP from later informal use of AATIP, separating contract history from assertions about continuing official programs.
AARO historical record report: Volume I ↗June 2013
The final tranche of the MOD transfer becomes public
The five-year transfer program reached its final tranche, including late UFO-desk records. The accompanying highlights guide explains how policy files, public correspondence, and sighting reports fit together.
Final MOD file transfer: 2013 highlights ↗January 2015
Two later Navy videos are recorded
Two Navy recordings that later become central to public UAP debate are captured in January 2015. The department’s release statement distinguishes capture from publication; later technical assessments must be read separately from the original designation.
Navy videos: authorized public release ↗2017
Navy footage circulates before official release
Navy videos circulate publicly through unauthorized release, according to the department’s later statement. Public availability precedes the 2020 authorization; the distinction matters when dating the footage and deciding what the government had actually confirmed.
Navy videos: authorized public release ↗March 2019
The Navy standardizes UAP reporting
The Navy establishes standardized UAP reporting, later described by ODNI. This improves collection practice rather than determining the causes of the reported phenomena.
Preliminary assessment: UAP ↗4 April 2019
Argentina reorganizes CEFAE as CIAE
The Aerospace Identification Centre replaced the earlier commission through an organizational restructuring. It retained public case resolution and annual publication alongside its wider task of identifying aerospace events.
Argentina’s Aerospace Identification Centre ↗27 April 2020
Pentagon authorizes three Navy videos
The Pentagon authorizes release of three Navy recordings from 2004 and 2015. The announcement authenticates their provenance; it does not establish extraordinary performance or an extraterrestrial origin.
Navy videos: authorized public release ↗10 July 2020
Uruguay issues a ruling on access to UFO records
The access authority called for disclosure of requested Air Force information except material properly classified. The ruling documents an access dispute; it is not itself a release of the underlying sightings.
CRIDOVNI records: access ruling 16/2020 ↗4 August 2020; announced 14 August
UAP Task Force approved
A Navy-led task force is approved to coordinate detection, analysis, and cataloging of UAP reports relevant to national security. The public establishment announcement follows ten days later.
Unidentified Aerial Phenomena Task Force ↗25 June 2021
ODNI publishes a preliminary assessment
ODNI reviews 144 reports and calls for more consistent data. Its assessment outlines possible explanations without establishing one cause for all cases.
Preliminary assessment: UAP ↗18 October 2021
CEFAA becomes SEFAA
An administrative resolution moved the Chilean office within the aviation authority and renamed it SEFAA. The change continued the public study of anomalous aerial reports under a revised organization.
Chile’s official UAP offices: institutional history ↗23 November 2021
AOIMSG succeeds the Navy task force
The department directs a successor group to coordinate work on objects in special-use airspace. Its stated purpose links improved identification with aviation safety and national-security assessment.
AOIMSG: successor to the UAP Task Force ↗27 December 2021
Congress requires a formal UAP office
The FY2022 NDAA becomes Public Law 117-81. Section 1683 requires a coordinated office, reporting procedures, analysis, and reports to Congress, creating a statutory framework later amended in subsequent legislation.
FY2022 NDAA: statutory UAP office ↗17 May 2022
House Intelligence holds a public UAP hearing
Defense and naval-intelligence officials answer questions about reporting, imagery, and analysis. The public transcript provides context for their statements and preserves distinctions between observations and what investigators can establish.
House Intelligence UAP hearing ↗9 June 2022
NASA announces an independent study
NASA announces a team to examine available UAP data and recommend ways to improve future collection and analysis. The scientific study is organized around evidence and methods rather than presuming an origin.
NASA independent study: program archive ↗15 July 2022; announced 20 July
AARO expands the federal investigation remit
A direction renames and broadens AOIMSG as the All-domain Anomaly Resolution Office. Its remit includes airborne, submerged, space, and transmedium observations; the department publicly announces the change five days later.
AARO establishment and mission ↗23 December 2022
Reporting protections and AARO duties expanded
Public Law 117-263 establishes authorized reporting procedures and revises AARO’s duties and oversight. The enacted language calls for handling reports and alleged programs; it does not verify the underlying allegations.
FY2023 NDAA: reporting and AARO oversight ↗Canada announces the Sky Canada project
The Chief Science Advisor initiated a review of public UAP reporting practices. Its purpose was to examine how reports were handled and propose improvements in coordination and transparency.
Sky Canada: management of public UAP reporting ↗12 January 2023
The 2022 annual report becomes public
ODNI publishes the report titled for 2022, describing additional submissions and initial characterization. Its publication year differs from its edition year, and incoming reports include observations from earlier periods.
2022 annual UAP report ↗19 April 2023
Senate examines AARO’s work
The Armed Services subcommittee holds an open/closed hearing on the office’s mission, activities, oversight, and budget. Official public materials preserve the unclassified portion of the proceedings.
Senate hearing on AARO’s mission and budget ↗31 May 2023
NASA study team meets publicly
NASA’s independent study team holds a public meeting on scientific approaches to UAP. Its program archive preserves the agenda and meeting materials, allowing the discussion to be read alongside the final report.
NASA independent study: program archive ↗26 July 2023
Graves, Fravor, and Grusch testify
A House hearing records encounter testimony, reporting concerns, and allegations about government programs. The witness documents make their accounts accessible while leaving independently verified findings separate from claims requiring corroboration.
House UAP hearing: security, safety, transparency ↗14 September 2023
NASA study recommends better evidence
The independent team publishes its final recommendations. The report explains how better-calibrated observations, complete metadata, and systematic analysis could improve scientific understanding of unidentified reports.
NASA UAP Independent Study: final report ↗18 October 2023
FY2023 annual assessment released
The assessment describes 291 additional reports covering a defined interval and older submissions. It discusses collection bias and analytic development, underscoring why reporting growth cannot be read directly as a rise in unusual craft.
FY2023 consolidated annual UAP report ↗22 December 2023
UAP Records Collection becomes law
Sections 1841–1843 of the FY2024 NDAA establish a National Archives collection and agency disclosure procedures, including withholding grounds. The enacted text is narrower than some proposed disclosure frameworks.
FY2024 NDAA: UAP Records Collection ↗8 March 2024
AARO publishes its historical review
AARO publishes Volume I, assessing past investigations and concealed-program allegations. Its report presents the office’s findings, methods, evidence, and limitations.
AARO historical record report: Volume I ↗10 October 2024
NARA issues transfer instructions
NARA sets a transfer deadline for publicly releasable UAP records identified by the specified October date. The memorandum requires digital records and metadata and encourages rolling submissions before the deadline.
NARA memorandum: transfer of UAP records ↗13 November 2024
House holds a second transparency hearing
Tim Gallaudet, Luis Elizondo, Michael Gold, and Michael Shellenberger testify on UAP-related transparency and research. Their statements and the hearing video are preserved on the committee’s official page.
House hearing: Exposing the Truth ↗14 November 2024
FY2024 annual assessment released
AARO reports 757 incoming submissions covering current and older observations. The assessment describes ordinary explanations, cases needing further analysis, and an active archive for reports lacking sufficient data.
FY2024 consolidated annual UAP report ↗19 November 2024
Senate hears from AARO’s director
Jon Kosloski appears before the Armed Services subcommittee on the office’s activities. The official page links the public hearing and supporting documents; the open/closed designation marks limits to what is publicly available.
Senate hearing on AARO activities ↗June 2025
Sky Canada publishes its reporting review
The final review offered fourteen recommendations on reporting, research, communication, and international cooperation. These proposals describe potential improvements, not proof that the recommended services already existed.
Sky Canada: management of public UAP reporting ↗29 August 2025
Disclosure amendment proposed for FY2026 NDAA
A sponsor announces a UAP disclosure amendment to the defense authorization bill. This is a proposal milestone, not enactment; the final Public Law 119-60 must be consulted for adopted requirements.
UAP Disclosure Act of 2025: proposed amendment ↗FY2026 NDAA: intercepts, data, classification guides ↗9 September 2025
House examines transparency and whistleblowers
The declassification task force hears additional witness accounts and testimony on reporting protections. Its official page provides statements and video, preserving the witnesses’ claims and policy arguments in context.
House hearing: transparency and whistleblower protection ↗30 September 2025
NARA transfer deadline for identified public records
NARA’s memorandum sets this deadline for transfer of publicly releasable records identified by 20 October 2024. The deadline does not establish that every agency completed its transfer or that every government record became public.
NARA memorandum: transfer of UAP records ↗UAP Records Collection: Record Group 615 ↗18 December 2025
FY2026 NDAA adds oversight requirements
Public Law 119-60 adds UAP intercept-briefing requirements, clarifies data availability to AARO, and requires classification-guide accounting. These enacted measures are distinct from broader disclosure amendments proposed during debate.
FY2026 NDAA: intercepts, data, classification guides ↗6 April 2026
Bill proposes ending AARO
H.R. 8197 is introduced to terminate AARO and transfer its functions. The linked document is introduced bill text, so this entry records a proposal rather than an operational closure of the office.
H.R. 8197: proposed termination of AARO ↗6 April 2026
Uruguayan parliament asks about reported UAP cooperation
A parliamentary request sought details of a reported international arrangement involving CRIDOVNI. Questions covered equipment, data access, costs, and oversight; the request alone does not verify the arrangement.
Parliamentary request on reported UAP cooperation ↗8 May 2026
PURSUE release database launches
The government launches its searchable UAP release portal with a first tranche of records. Subsequent tranches are published separately; individual observation dates can precede publication by many years.
PURSUE: government UAP release database ↗22 May 2026
Second PURSUE tranche released
The department announces a second installment of public records. Release filter R02 in the official database identifies the associated documents and media; the publication date is separate from their incident dates.
PURSUE release 02 announcement ↗PURSUE: government UAP release database ↗12 June 2026
Third PURSUE tranche released
A third installment is announced as the government continues publication. The associated portal records supply item-level provenance and context; a tranche announcement itself does not resolve the reports it accompanies.
PURSUE release 03 announcement ↗10 July 2026
Fourth PURSUE tranche released
The government announces the fourth installment of its UAP release effort. Documents and media are accessible through the official database, while any explanatory conclusions require examination of the individual record.
PURSUE release 04 announcement ↗20 July 2026
AARO posts its FY2025 annual report
The report concerns observations and submissions through 30 May 2025, despite its 2026 publication. It describes 319 incoming reports and explains that the cases resolved during the interval had ordinary causes.
FY2025 consolidated annual UAP report ↗AARO congressional reports and briefings ↗3 August 2026
Chile publishes its July case compilation
SEFAA added the July compilation to its 2026 resolved-case series. The dated entry provides an access point to recent official case material and distinguishes publication from observation dates.
SEFAA July 2026 case publication ↗7 August 2026
Fifth PURSUE tranche released
The fifth installment becomes public. It is the latest verified tranche in this edition of the archive; the official release portal remains the access point for its files and subsequent additions.
PURSUE release 05 announcement ↗Selected public records and official collection access points. Some holdings are undigitized, redacted, classified, or available only by request. A released document can contain unverified claims. Follow collection links for broader available holdings.