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.
“Roe”1 page
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Evaluation
0-Balloon
l-Aslnllloln1ul
2•Aircraft
Hiah1Ph810m.
4-Birds
~Cloud' Dus~ et~
6-lnsutfit.lnfo.
7-Psycholo1ical
8-Unknot11
9-0ther
Total
EVllu,tion
0-Balloon
1-AsbDrmical
2-Aircraft
3-Liahl 1'11810"-
4-Birds
~Clouds, Dus~ et~
6-lnsuffic.-.fa.
7-Psydlolo~cat
1-Unlalo•
!1-()11,e,
Total
I Evaluation
0-Balloon
1-Astnnllical
2-Aircran
3-LiahtPh-.
I-Birds
Hloud~ Du~ el~
6-lnsuffic. •ID.
7-Psycholo&ical
1-Unkno•
!I-Olller
Total
Certain
Certain
Certain
0
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()
0
0
0
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.4
,
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Nudter Per Cent Number Per Call
ertain Doubtfu I Total Certain Doubtful Total Certain Doubtfu Total Certain Doubtful Total
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Nud>er Per Call Number Per Call
ertain DoubHul Total Certain Doubtful Total Certain Doubtfu Total Certain Doubtful Total
' 0 C IJ.O IU IJ.O 0 ]I 0 (),0 0.0 1),0
1 3 $' L/,J c., /().8 2 I ~ 18,2 'I. I 27.3
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Nud>er Per Cent Number PerCmt
Certain Doubtful Total Certain Doubtful Total Certain Doubtfu Total Certain Doublful Total
0 0 0 n.o 0,1) P.I) 0 0 p 0- 0 O.P tJ.p
I I :l.. 33,3 3J.J (,t,{, i; 0 I{ /dQ.O /J. p /()(),()
0 0 0 0.0 o.o u 0 0 0 0.0 o. 0 0,P
I 0 I 3J.J o. 0 33.1 0 0 0 o.o o. O l?.O
0 0 0 0,1 n.P O.d 0 n /) o.o O·O P.P
0 0 0 o.o o.O 0.1, 0 0 () d.O O· 0 to
0 (J 0 o.o O.d M.0 11 I) 0 P.P d· 0 O.P
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2 I 3 ,,.; JJ.:; 1, a,. 0 0 s {uv.o o.o /OP. Case file, from the pursue collection. The PDF is mirrored here; the original link is above. 312 pages are in the text index: search them above, or from the library's search.