Documents / Official release
This Federal Bureau of Investigation file section, 62-HQ-83894 Section 6 (serials 246 to 301), collects FBI memoranda and correspondence from 1950 to 1952 on flying saucers. It covers green fireballs and discs seen near sensitive installations in New Mexico, Dr. Lincoln LaPaz's analysis, and the Air Force's Land-Air study known as Project Twinkle. It also holds an OSI summary, a USAF directive on reporting unconventional aircraft, a dissolving object reported by Philadelphia police, and letters from members of the public.
From the source:Release of 2026-05-08 Incident: N/A, N/A. The FBI's 62-HQ-83894 case file includes investigative records, eyewitness testimonies, and public reports concerning Unidentified Flying Objects and flying discs documented between June 1947 and July 1968. The records include high-profile incident accounts, photographic evidence from sites like Oak Ridge, TN, and technical proposals regarding potential propulsion systems. Additional topics include convention programs, researcher accounts, and extensive media coverage from the period. This file is partially posted on FBI vault with more redactions and some pages missing. Included here is the complete case file with several newly declassified pages and only minor redactions.
“Office of Special Investigations”19 pages
## PAGE TWO OF THREE HUNDRED FIFTY TO THREE HUNDRED MILS AT A RANGE OF APPROXIMATELY THIRTY THOUSAND YARDS, APPROXIMATE ALTITUDE THIRTY ONE THOUSAND FEET. THE SET TRACK AUTOMATICALLY IS AZIMUTH AND ELEVATION AND WAS AIDED RANGE TRACKING AND CAPABLE OF TRACKING TARGETS UP TO A SPEED OF SEVEN HUNDRED MPH. IN THIS CASE, HOWEVER, BOTH SETS FOUND IT IMPOSSIBLE TO TRACK THE TARGET IN RANGE DUE TO ITS SPEED AND THE OPERATORS HAD TO RESORT TO MANUAL RANGE TRACKING IN ORDER TO HOLD THE TARGET. THE TARGET WAS TRACKED IN THIS MANNER TO THE MAXIMUM TRACKING RANGE OF THIRTY TWO THOUSAND YARDS. THE OPERATOR SAID THE TARGET TO BE MOVING AT A SPEED SEVERAL HUNDRED MPH HIGHER THAN THE MAXIMUM AIDED TRACKING ABILITY OF THE RADAR SETS. THIS TARGET PROVIDED AN EXTREMELY STRONG RETURN ECHO AT TIMES EVEN THOUGH IT WAS THE MAXIMUM RANGE, HOWEVER, ECHO SIGNAL OCCASIONALLY FELL OFF TO A LEVEL BELOW NORMAL RETURN. THESE CHANGES COINCIDED WITH MANEUVERS OF THE TARGET. ON SEPTEMBER ELEVEN, FIFTY ONE AT ABOUT ONE THIRTY P.M. THE TARGET WAS PICKED UP ON AN SCR FIVE EIGHT FOUR RADAR SET THAT DISPLAYED UNUSUAL MANEUVERABILITY. TARGET WAS APPROXIMATELY OVER NAVESINK, NJ., AS INDICATED BY HIS TEN THOUSAND RANGE, SIX THOUSAND FEET ALTITUDE AND DUE NORTH AZIMUTH. THE TARGET REMAINED PRACTICALLY STATIONARY ON THE SCHOPE AND APPEARED TO BE HOVERING. THE OPERATOR LOOKED OUT OF THE VAN PAREND THE VEHICLE HOUSING THE RADAR SEFA PAREND IN AN ATTEMPT TO SEE THE TARGET, SINCE IT WAS AT SUCH A SHORT RANGE, HOWEVER, OVERCAST CONDITIONS PREVENTED SUCH OBSERVATION. RETURNING TO THEIR OPERATING POSITION THE TARGET WAS OBSERVED TO BE CHANGING IN ELEVATION AT AN EXTREMELY RAPID RATE, BUT CHANGE IN RANGE WAS SO SLOW THE OPER-END OF PAGE TWO
Official release, from the pursue collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 271 pages are in the text index: search them above, or from the library's search.