Documents / Case file
This CIA archives copy, released in 2026, holds Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects). The Air Technical Intelligence Center at Wright-Patterson Air Force Base issued it on 5 May 1955. The study reduced about 4,000 sighting reports from 1947 to 1952 to IBM punched cards, with 3,201 cases charted, and applied chi square tests to compare known and unknown sightings. It concludes that it is highly improbable the reports represent technological developments beyond present-day scientific knowledge.
From the source:Release of 2026-06-12 This is the USAF Project Blue Book with a CIA cover sheet stating the document is "Official Record Copy." With the exception of the handwritten note on the first page, the content of this document has been available on CIA's public website.
U. s. Air Force Technical Infonnation Sheet Question Punched Card Column 3 39 4q 41 42* 43* ~46 Code Description Hour Angle Angle of Elevation of the Sun Group Classification sun Bearing Angle Time Units Duration 54 of Observation l.5. 56i How Observed 5.si Group Classification 16a. 57* Sound 16b. 58-ii- Object Color 16b. 17. 59"- Light Color Physical______......__________.6r!◊*,..--------c-01;.;..o-r_Gr___oup Classification 19. 61* Number lla. llb. 39. 62* Speed 17. lB. 24. 63-lf, Shape Description --=it"':::1,..,1:~.~21=-.----:2~2~.--:s24r-.-----~6"4-*--------=s-=-i--ze___ 10, lle. 65* Light Brightness 5. 11, 17. 20. 66-ii- Angular Velocity Motion 33. 67* Angular Acceleration 29. 31. 1. 68i Appearance Bearing 23. JO, 31. 2. 69-ii'. Disappearance Bearing 7◊* Initial Elevation31 • 32• 71* Final Elevation Description 41. 72* Orientation 73* Maneuvers 74* Observer Occupation 7$i Observer Rating Observer 7&t- Report Rating 77* Reliability Group Classification 78-ii- Final Identification * Denotes that separate code key is needed. 312 I I I I I I I I I I I I I I I I I I I I I I
Case file, from the pursue collection. The PDF is mirrored here; the original link is under it. 312 pages are in the text index: search them above, or from the library's search.