U.S. Government UFO Document: 

“1957 CIA Memo Concerning UFO Report”

(Central Intelligence Agency, Washington, D.C.)

(CUFON.org, U.S.A.)

The memorandum (titled “SUBJECT: Unidentified flying Object Reported on 20 September 1957”), dated 21 September 1957, concerns the radar detection of a UFO over the state of New York the preceding day, CUFON informs:

http://www.cufon.org/cufon/1957cia.htm

Quote from the web page:

“It is an interesting document for several reasons:

*  It mentions interest in UFO at a very high level of the intelligence community, the Intelligence Advisory Committee (IAC)

*  It mentions what is possibly electromagnetic interference with multiple radars coincident with detection of a UFO

*  It mentions action by elements of the military and intelligence communities very quickly after a UFO report”

(wikimedia.org image)

U.S. Government UFO Article: 

“DRAFT OF ARTICLE FOR AUGUST 
AIR INTELLIGENCE DIGEST”

(NICAP.org)

The article was written by U.S. Air Force Captain Edward J. Ruppelt in 1952:

http://nicap.org/articles/ruppelt_aid_draft.htm

The late Captain Edward J. Ruppelt, U.S. Air Force,
Head of Project Blue Book (1952-1953)
(NARCAP.org photo)