CIA-UAP-014 is a Secret memorandum for record dated 18 December 1952, signed by H. Marshall Chadwell, Assistant Director of Scientific Intelligence at the Central Intelligence Agency. The document was released by the Department of War on June 12, 2026, as part of PURSUE Release 03, under Section 1842 of the National Defense Authorization Act for Fiscal Year 2024. The memo records intelligence received through a British messenger regarding British government activity in investigating unidentified flying objects, with the incident date recorded as December 1952. No specific incident location is identified in the metadata, though the document centers on a sighting at an RAF field in Yorkshire. 12
Provenance and Classification
This document originates from the Central Intelligence Agency and carries a classification of SECRET. Its release in 2026 as part of PURSUE Release 03 follows the legislative mandate of the FY2024 National Defense Authorization Act, which directed the declassification and public release of UAP-related government records. According to the official blurb, a more redacted version of this memorandum had previously been available on the CIA's public website, making the 2026 release notable for the additional detail it may expose relative to that earlier disclosure. The memo was authored by H. Marshall Chadwell, who served at the time as Assistant Director of Scientific Intelligence -- a senior position responsible for coordinating intelligence assessments of scientific and technical developments with national security implications.
The chain of custody is consistent with standard CIA memorandum-for-record procedures of the early 1950s: Chadwell compiled the record following the arrival of a British messenger, memorializing intelligence exchanged during that contact. The document's release through the Department of War's PURSUE program represents its most complete public form to date. 3
Contents and Purpose
The memorandum communicates intelligence gathered from a recently arrived British official regarding the British government's formal engagement with the flying saucer phenomenon. The primary interlocutor named in the record is R. V. Jones, a British official involved in UAP investigations, whose communication provided the basis for the memo's contents. Chadwell recorded what Jones described about British institutional structures, recent incidents, and the operational concerns that UAP sightings were generating within the British defense and intelligence establishment.
The memo serves a dual function: it documents intelligence on allied activity and frames the UAP phenomenon as a set of operational problems requiring coordinated responses across multiple U.S. government agencies.
British UFO Investigation Framework
According to the memorandum, the British had established a standing committee specifically focused on flying saucers approximately sixteen months prior to December 1952, placing its formation around September 1951. The committee was presumed to operate under the direction of Dr. R. V. Jones. This institutional arrangement signaled that British government concern about UAP was sufficiently serious to warrant formal bureaucratic infrastructure.
The committee had reached a significant finding: the sightings it had reviewed were not attributable to enemy aircraft, and none of the incidents had occurred over British territory. This negative conclusion was significant in the Cold War context -- it did not resolve the question of what the observed objects were, but it did rule out Soviet military aircraft as an explanation for the reports under investigation.
The Yorkshire RAF Incident
The central case discussed in the memo involves a sighting at an RAF field in Yorkshire that occurred approximately ten to twelve days before 15 December 1952, placing it in early December 1952. The incident arose in the context of what the memo describes as "some sort of demonstration to which high officials of the RAF in London had been invited."
During this demonstration, a "perfect flying saucer" was observed by the assembled witnesses, which included senior RAF officials from London and RAF pilots stationed at the field. The breadth of the witness pool was substantial enough that multiple articles appeared in the public press following the incident. This public dimension was a source of concern for Jones, who recognized that managing and correcting public opinion about such sightings had become part of his institutional responsibilities alongside the investigative work.
The Yorkshire incident illustrates the recurring tension British officials faced: UAP sightings at military facilities with high-ranking witnesses could not easily be contained within classified channels, particularly when the number of observers was large enough to generate press attention.
Historical References and Intelligence Exchange
Jones contextualized the Yorkshire incident within a broader pattern of UAP activity. He referenced the Swedish incident -- understood to refer to the wave of sightings that occurred in Sweden in 1946 -- suggesting that British analysts were treating contemporary sightings in the context of an ongoing and internationally distributed phenomenon rather than isolated events.
Jones also referenced a scholarly work on the origin of meteorites published in the French Academy of Sciences between 1760 and 1780 by Chladni. This reference indicates that Jones was considering whether historical scientific literature on anomalous aerial observations might offer relevant precedent or explanatory frameworks for contemporary UAP reports.
The memo also records that Jones had been informed of U.S. interest in the Tremonton incident, in which a Naval non-commissioned officer had captured film footage of unidentified objects. Jones expressed possible interest in obtaining a copy of the film or further information about the case. This exchange reflects active transatlantic intelligence sharing on UAP evidence during the period and demonstrates that the Tremonton footage had already attracted allied attention by late 1952.
Potential Dangers Identified
Despite the memo's opening acknowledgment that "there is no indication that these objects represent a direct threat to the national defense," Chadwell's assessment identifies three significant operational dangers arising from the UAP phenomenon.
The first concerns early warning system effectiveness. The difficulty and delay involved in positively identifying unknown aerial objects could weaken the early warning network's ability to alert defense forces at the onset of hostilities. In the Cold War environment, the inability to rapidly distinguish UAP from Soviet aircraft represented a genuine vulnerability in the detection and response chain.
The second danger concerns mass hysteria. Chadwell notes the possibility that an enemy could deliberately induce widespread public panic at a critical moment through faked UAP reports. The Yorkshire sighting's rapid appearance in the public press demonstrated how such incidents could capture public attention quickly. This concern reflects broader Cold War thinking about psychological warfare and information operations as instruments of statecraft.
The third danger involves communications overload. Emergency communications systems linking command headquarters could be seriously congested at a critical moment by the volume of UAP reports. During a military crisis, an influx of flying saucer reports could interfere with legitimate military communications and coordination, creating operational disruption even absent any direct threat from the objects themselves.
Proposed Actions and Assignments
The memo identifies these three dangers as problems requiring action outside the intelligence community. Responsibility for addressing the mass hysteria risk falls to the Federal Civil Defense Administration and/or the Interdepartmental Committee on Internal Security, who were to be briefed through established channels. This assignment reflects the view that public information management was a civil defense and internal security function rather than an intelligence community task.
The communications overload problem was to be examined by the Individual Military Services, with the subject to be introduced at a meeting of the Joint Communications and Electronics Committee. This distribution of responsibility ensured that each service would assess its own communications vulnerabilities with respect to UAP-related reporting.
Handwritten Annotations
The bottom of page 2 of the document contains partially legible handwritten annotations. Visible text references "BG" (possibly Brigadier General), "ARK Marshall," "ADC," "cognizant of," "personnel," "lengthy," and the phrase "does 'express concern.'" The incomplete legibility of these annotations limits their definitive interpretation. They appear to represent follow-up questions or directives relating to the memo's contents, potentially from a senior official reviewing the document after its initial circulation.
What The Record Supports
This memorandum establishes that by late 1952, the CIA was actively tracking formal British government engagement with the UAP phenomenon and recording intelligence on British investigative structures and incident reports. It confirms that a sighting at a Yorkshire RAF field in early December 1952 was witnessed by senior RAF officials and pilots and attracted public press coverage. It documents that R. V. Jones and his British committee had concluded the sightings they reviewed were not enemy aircraft and had not occurred over British territory.
The record supports the conclusion that U.S. and British intelligence officials were exchanging information on UAP cases and analysis during this period, including interest in the Tremonton film. It also demonstrates that by December 1952, U.S. intelligence was treating the UAP phenomenon primarily as an operational management problem -- degraded early warning, mass hysteria risk, and communications overload -- rather than as a scientific question to be resolved.
The record does not establish what the objects observed at Yorkshire or in other reviewed cases actually were. The Yorkshire incident and the other sightings referenced remain unidentified and unresolved in the document itself. The memo offers no identification, explanation, or conclusion about the origin or nature of the observed objects.