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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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Ewaluation
10.Bolloon,__
'l-Astn,ranical
l2-A1rcrlft
!J.L•ihl Ph""•·
4•Birds
$-Clouds, OusL et~
6-lnsuffic.-.a,.
7-Psydmlo&ical
1-UNrno•
~llr..
Total
I Evaluation
0-Balloon
I-Astronomic.al
2-Aircrift
3-Lr&fll Ptlenom.
4-Birds
$-Cloud~ DusL et~
► lnsuffic.lnlt>.
7-Psycholoaical
18-Unlrno_,
9-0lher
Total
' Evaluation
0-Bllloon
l•Asbonomical
2-Aimaft
l·Liahl Ptumm.
4-Birds
S-Clouds, Oust. etc.
6-lnsuff1c.Mfo.
7-Psydoolo~cal
8-Unkno'MI
9--0ther
Total
Certain
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.a-
n
IJ
h
0
ti
2
:l
?
JI
Certain
i,;
'"l'l
3
0
I?
b
0
='l
lful Total
ti 15 ~5 ,~ 9-3
q ,3/ RL ,u /9)..
"2.L. 4t ,.z .:u.=lful Total Certain Doubtful Tola!
i /2 21) g,'I Fl./ ;JJ.8
13 10 ~3 it/./ }/\,q )5/J
5 n IB 5tf Jtl-:/ /f.5
" 4 4 ()4 4:"3 4-3
4 I .5 .,._3 /. I 54-
,1 I I o.iJ /./ /.I
q 0 ..,. "1,3 d.() 4-3
0 IJ ~ .()/) t'-/J /),/)
14 /) ff 15.Z ().{) 15.2.
2- I 3 -z.:2 I. I 3.3
50 4-2- 'fZ 5'1-ft- 14:5.1, /{».
115
MAJ!'{!;./ AP,elL
Number Percent Number POICent
Certain llou!Jlful Total Certain lloublful Total Certain lloublful Total Certain Ooublful Total
3 I 4 1/./ 3.? 14l 3 3
' f o.(J ).0.i '13 /) H ~ O.IJ !.2.3.4
JI I :u. l.'I .I 2.ri q 5 14- t~ J.3 34
5'13 li'I 782.. 75.'l ;l't.;l. IOd. l-74 1;1..3 39? ,9,7 "3/.3 JOO,
A/AVEMdE,e /Je:eGM/.1£12.
Nuntier Per Cent Number Per Cent
Certain Doublful Total Certain Doublful Total Cerfllin Doublfu Total Certain llflrblful Total
z 'I II ~I. 13.~ ''-4 /J 3 3 M +.I.. 4-;6
5 ~ 13 '1.( ti-~ /9.4 II 'I u l'-7 /3.I, '.10.'\
., 3 I, <I:~ 4:~ </,/) I ,1 /4- /.5 11'1. 7 2./.2.
2. I 3 ~-0 ,.~ 4-.~ I 0 I u 1.4 1.5
() 0 0 t).() Q.l 0.0 d /) 0 (J.6 ,1.() 0.0
0 g 'J n.() 11.q ,1.9 {) /) t) 0 n6 ,1_"
4- 6 a '-/J /).IJ '!) 3 f) 3 ""·' 11.6 4-.,
I i? I 1.5 t'-0 ,., t) l IJ o.o n.t) 0.0
19 0 I'! '),Q~ 4() .d-4 ;a tJ ~ R4- d.tJ 133.4
2 0 z 3,1 M 3/J 3 IJ 3 4.~ A./J "I':'
3~ z.9 ,1 s-,.'J 4-83 1()/). .f-/ :z..s
'' I,}../ 37.'I /t/1), 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.