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.
“R.G.”2 pages
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Evaluation
0-Balloon
I-Astronomical
2•Aircratt
3-LiehtPhenom.
4•8irds
5-Clouds. Oust, etc.
6-lnsuffic.lnfo.
7-P,ycllolO&iCII
II-Unknown
9-011111
Total
Evaluation
0-Balloon
I-Astronomical
2-AircraH
Hi&htPhonom.
4-Birds
S-Clouds,Dus~et~
S-lnsuffic.lnfo.
l•Psycholo1ical
II-Unknown
9-0l!ler
Tot•
Evaluation
~Balloon
1-Astronomical
2·Aircraft
3-Li&ht Phonom.
.. Birds
5-Cloud~ Dus~ etc
6-lnsuffic.lnfo.
I-Psychological
II-Unknown
9-0ther
Total
Evaluation
0-Balloon
l•Astionomical
2·Aircrlft
3-Liil't Ph..,..
4-Birds
5-Clouds, Dus~ et~
6-lnsuffl~ Info.
7-P,ycllolo~c:al
II-Unknown
-..
Total
EJ/;IL(l,fr'/C:W'. t2F (l,fl.J£er v'Jftt'.rtlfl6S 62&' d£t, S'£COIVL7S J/-31) SFctJA'.PS 3/-J:',t} 0£CtJIVOS
Number Per Cent Number Per Cent Number Percent Number Per Cent
Certain Doubtful Total Certain Doubtful Total icertain Doubtful Total Certain Doubtful Total certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Tot~
L)
" t) d. /) l?.0 0.0 /) .tJ I) at £: tJ 12() / I :z_. 7.7 77 l.f:~ , n 0 ll_n n./J ,?,O
6 .J 9 JS"J l'U S).,9 ✓ ,? 5' 1.-r,,1 tJ.0 S.5:/, I I ,:I.- 7,7 7,7 1.r./, ~ I 3 ;s;,- 71 f2.3./
,,2 I J //.~ 5:r /7,7 I 0 I 1/./ t?,0 1//./ J 0 3 ;23/ t).t) ,23/ J ~ ;- ./2.3.I /§':-'f ,JB:S
/ ,t) I ."9 t?.t:J r., LJ 0 t? 411 ao .a, p ,0 0 1/J.,? J?.t? /?,L) ... J I "?" 7.7 Z'/
e; I I ,/J./J -~ 5";9 ,:, I I /)I, //,/ //,1 ,tJ I'} ,t} l'J?.o 0.0 o.o ,., " /,? 1,.,.,, "'· /) /l/l
/') l!J t? /7./J /J.v ,:J,t:J ,t)
" t? /JI. /)_I) tJ.P /j I / In. t> 7,7 7,? L)
" t? -'-!" /J,LJ o.o
I 0 I r,I.J nn S:'f A
" CJ NJ t'.O tJ.t .1 0 3 .231 ,,,~ )J,J () 0 ~ ,,, ,, /J.CJ tJ.O
" 0 /? /J.l /)/) IJ.0 /} 0 0 t() tJ.P I)~ I 0 I 7.7 /J. /) 7,7 I d I 7.7 n.n '7.'7
,;z. 0 .z_. ii.¥ /J.L) //,7 :l. CJ .)... ~2 t).() 1~1'.:2 I ~ I 7,7 I,?. CJ '7,1 s ·" 3 I~ -:i,/ ,'2.t) -:JJ./
0 0 t7 ,2t) t?.O /J.O L) 0 t? t?J t?,() tU Li 0 ,,, /J.I? ,1/1 t;() 0 0 L/ O.t:::? o.t:J I).~
/;L S- I? 17,U :ZVI· JtJt) 1 I e; Yf.1 J/./ ///. //7 3 /.3 7/.9 ~I )/)0, 'I /f- I.! t?.~ 31?.1 Jt?a
J;/ S',,c-,0 ,,~c - S-- M1#0TF.1 6-3:1 /l✓1, A/P,,-,e-S /Jyp',;, ..J'f? ,,W,,,111t1TE'> /7v17.,4-r,,,,, ""'T S'T/ITPP
Number Pl!t'Cent Number PerC"1t Nuntier Percent Number PerCmt
Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total ~ertain Doubtful Total Certain Doubtful Total Certain Doubtfu Total Certain Doubtful Total
I 0 I 3.3 /) CJ D t 2 '$ ;r,; t!I )/1;3 4 ~ 7 2-. j l?t )fl,/ d J ;/ li/;f 7,1/- ~.,I.
I I 2.. 3.3 3, 3 t.6 .s- ~ 'l /.>..2. ?.I 1;24,3 ,fl :2 ..2-. t?J. I/.! 1//,8' 4-- ! 7 1//.5' //,/ 11-S.-'7
'l .l I, 7"13 li? fP.t? 4 :z.. 6 12./ ,{./ IV- I I ,,2 f:'l .F.? //,8 I e, / J.? /J.t:J :j7
I 0 I 3.J /J. 0 ?3 ~
" .1- £.I ~t) ii ~ 0 ~ r?,.., /,/ /? ao I 0 I 3.7 tJ.t:J 17
/) 0 /) /J.,, ao t7. 0 a 0 tJ L?.O /?,O 10.a /J 0 t) ~t) cJ.O /J.C. b • (J ,1 0.0 t:J.O l?.O
h " t? ,, /) 11.0 ,?.0 0 /) C' ,.,,.., /). 0 IJ'J. I?
" " t7 /J,t} /J,,,; n, 0 (1 p &/J at? c?.o
l 0 .3 /~/) 0.0 /O.t) I l!J I J,tJ t).t:J J:I) .:2. 0 ? II.% ao J/.i 4 0 ,4 1141.S' ....,,., /1/,f
LJ d t? ,,. /) /2 0 ~6 ,P I) ~ ~,,., 0.0 t:?. 0 0 d /? t:J.t:. c}.t) 0.CJ L) 0 JP atJ /l/? ()./,
x ,0 ( 1~7 ,.,,.., j..t.') .r ,0 ..) 1.r:.2 ,-,,0 E,). 1
" 3 IU 17, tJ /7,/, 7 0 7 ~£9 /20 ,:2.$:9
,., l!J t? 1ao t).t) tJ.o ,.1.... I ~ £.I :1t? u ,:? I I rin 5:'l S.9 I ,, I J,7 /1 n J.7
.),/ f 136 17t?ti JM !/l)t) .£S f' JJ 75:K j.il,.2 ltJC. /IJ 7 17 fl.'/ 1/1,2.. JP/). .2.,Z. ~ :21 3'/£ /f:.5' /00.
rtJe ,w,RArN1A/ ,.,,, s1~_,,,r,A/ ✓-: AdJ,C/175 ,.,,,. ?--ue,e.. ,1/1 ,,..,~..s
..FS.EcPNP.J:> / F,r ,,-/t) $$Ca,vn~ //-3/,J SP-CPA/.t75 ~/-tf'tJ S$CM'0.5
Number Per Cent Number Per Cent Nullmer Per Cent Number Perc«it
Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtfu Total Certain Doubtful Total
,p ~ t? tJ.O t),,:J &.t:J I 0 I 'l,3 /{I, (3 / 1 3 71 111;3 J,/,Jf I I ,:2... 7,7 77 /5:11-
9 t /'> 2-9,tJ /9,)) 1-1!.~ 4- (7 ,tf 2-'?J ,1tJ l-3'.J.3 :J 0 ~ /#.i /J.O /If;~ 41 I I Cl,/J 7.7 J,7
,I, I ~ /7~ %,:Z. I!./ p :l ~ O.D 11.7 /£7 ,{ I /f- :)./,I, 7,/ J.8:S .:z. 1 r IS:-lf V,/ 15:5
&
" ;J t).t:) /J./J ,.,.,, /} I I 17./J u t. ":? I 0 I 7./ ,.,_t:J 7./ /J
" I? /.J.tJ /) /1 ~A
" I I tJ.O -:f? .J.2 I) 0 t? JJ;; t?,() t?.O ;? I I t::?tJ 7/ 7.J a 0 ~ /J.0 I?.£) tJ.o
I) I I an 3.~ 3,:Z. p " ,? tl.CJ t?.O ao ;? () 0 t?,/? ,.,_,., n,-, ~ ,, /) ,,_n ,::;. /1 n,t:J
1 " 1 f-7 ao 't,7 :I... 0 ..z /6.7 /J.() II.' ,:, CJ t? .,,,, ,,,,,, ao p 0 ,t? a.o /),/) 0. l)
,') 0 "I) /J.t:J /J.O /J, /) ~ CJ I? tJ,t a~ tJ.t ,:, I I /JI? 7,/ 'T, I ,:, 0 t? tJ.t) 0.0 (J /)
6 0 i /?.If t?,tJ /'/.ti / 0 I ({.j 1() 'l..3 ::)
" ;z_. ltf.1 0.0 Jlf,3 4- 0 μ 3af /l 0 .?RS
t> ,, t? ,?.I? /J.L) l.tlo I
" I !"3 t?.P 1J d 0 tJ lao ao O.o I ,:J I 7,1 a. tJ 'l7
,,J..-2... CJ .11 7/,/, .t..'U IJOt! 'I .3 l;l.. 75:t) ,:;...s:p ld't? '1 _j /,/ It~ J5;7 Jl)P. J7 ...r 12 16Lf 35'.S- ;J)a
f;/mber PerC01t Number PerCeot Nu- Per Cent Number Percent
Certain Doubtful Total Certain Doubtful Total (.;ertain Doubtful Total Certain Doubtful Total f,;ertain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total
I .:z 3 .J.I 7,/ /tJ.7 3 :i. s /tJ.~ t.9 17:J... I 0 I /,.2,j ,?.I) 1,:2;$" .1 I ? L,3 J. / I.J.4
I I ., 36 J.I, 1...1. .r J 6 /7,). 3/J ,ti.I .l ,:, 3 13'7,5 tJ.t? 17,.S- t. .2. S' II.I ,.~ 1£/
4 4- ff' /If;? 111-,J -?f{,I, 4- 4- 8' !J'S J:J,! 1'11'7~ .2 ,:, 2 ,2.5;~ tJ.tJ .2..~ _, ..... l ,?_,, IJ. 0 tJ;;
/} 0 tJ tJ.t tJ.() l.tJ t; (;1 t) (),0 tJ.tJ P.t " 0 C tJ.() 00 o.o t!) ,, /l "·" CJ.0 IJ,t}
J I) I ?,J /J./) J..t I ,, I ?.If 110 :u tJ " ;J /)_() 00 JJ.O I. 0 6 Ill "·" /,1.(
..2 I .1 7,/ J,t lt?.7 L1 .0 ,t7 at 1),/) .atJ / 0 I /..2S 1# l/.:2.5 I 0 I .5./ P.t> 3./
J/)
" //) 1'.0 tJ.tJ 3.5:7 7 (J 7 2LJ, /J.tJ 2JJ / 0 I /:Z.S 11./J 112.5 _r" ~ .> If.I. t:J.o IS:!,
/J 0 t? /J,tJ ~o t'.O ;? J I /)/ 311- .v, ,::; (;1 t) ,J.j /J.tJ t)o ,,, I I P.o -l I '11./
/9 9 .:1.1 ,"7,9 ~, 1100. :Z...J lf !l.'i /,2.I/ l~~t 100. if 0 .i' /P/),fi ,17,t! /t'e?, ~(' 1 ;, 1.f,J 2/_tl lt't?.
231 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.