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Category Shape / form From year To year Country Time of day Witnesses Evidence Status Duration Sound Colour Motion Lights Sources include Min photos Min videos Min sources Min score Sort order

3D model Narrated

“H. Marshall Chadwell”

Stories2

The Robertson Panel: The CIA's Secret UFO Review

January 14, 1953 · Washington, D.C. (exact building unresolved; CIA headquarters and the Pentagon both claimed)

United States

UAP · Disc / saucer · 33 sources · 1 photos

46Partially documented

The RAF Topcliffe "Perfect Flying Saucer" During Exercise Mainbrace

September 19, 1952 · RAF Topcliffe, near Thirsk, North Yorkshire (approach to RAF Dishforth)

United Kingdom

UAP · Disc / saucer · 20 sources

33Partially documented

Documents53 · see all

Untitled (to Samuel Goudsmit from H. Marshall Chadwell Regarding Passing Information on Aerial Phenomena Research Organization) FOIA release

Central Intelligence Agency· 1953-04-07· 3 pages· 3 pages mention it
- p. 1 …Cordially yours, H. Marshall Chadwell 5 - 3 Distribution: JD/SI - 2 Cps/SI - 1
- p. 3 Mr. H. Marshall Chadwell 2800 Quebec Street, Art. 1717 Washington 8, D.C. Dear Chad: When I spent those few…
Untitled (to H.p. Robertson from H. Marshall Chadwell Regarding Copy of the Panel Report; with Robertsons Letter Dated 530120 Attached) FOIA release

Central Intelligence Agency· 1953-01-28· 2 pages· 1 page mentions it
- p. 1 …22 January. And so, until next week. Cordially yours, Signed: H. Marshall Chadwell II. Marshall Chadwell OSI:FCD/nts (29Jan53)
Untitled (to J, Allen Hynek from H. Marshall Chadwell Thanking Him for Letter of 23 December Confirming the Astronomical Calculations Transmitted Earlier by Telephone) FOIA release

Central Intelligence Agency· 1952-12-29· 2 pages

…Marshall Chodvoll Distribution: Opna/SI - 3 AD/SI - 1 CSI:FCDurant/ntw (29Dec52) 21 Dr. H. M. Chadwell…
Unidentified Flying Objects FOIA release

Central Intelligence Agency· 1953-04-03· 2 pages· 2 pages mention it
- p. 1 …What $ \textcircled{2} $ is the equation? $ B - 3 $ How many (answers) H. MARSHALL CHADWELL OSI/OSI strong:kv1 (20 May…
- p. 2 …2} $ in question? B-3 How many conclusions. H. MARSHALE CHADWELL CSI/PGSstrong:kv1 (20 May 1953) Distribution: Orig and…
Consultants for Advisory Panel on Unidentified Flying Objects FOIA release

Central Intelligence Agency· 2001-06-05· 2 pages· 1 page mentions it
- p. 2 …CHADWELL H. MARSHALL CHADWELL APPROVAL RECOMMENDED: Signature: ការបង្កើត Deputy Director (Intelligence) Date ACTION BY APPROVING AUTHORITY: Approved…
Unidentified Flying Objects FOIA release

Central Intelligence Agency· 1953-05-27· 1 pages· 1 page mentions it
- p. 1 …be routed directly to Physics and Electronics Division. ? H. MARSHALL CHADWELL OSI/OSStrong1 (20 May 1953) Distributions Orig and 1…

All 53 documents →