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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.
“R.G.”2 pages
. LJP',£, s. C~A Ad,, L1 r/t7,?/ Ar- - •/ -1A /
5' ',,( /%,7 '11-71 '2D. 1 33 /7,S L, :.z2q
2-Aircraft /,; It/ ?1 ,ti, /,t, /,2,I, /2 f' ,u /],2 'U "171. li :Z3 M' /,.g /,(5 l:n,
3-Li&hl Phenoa,, 2. {) ~ t. t),t, ;?.9 I t) I I.I l).t /, I I I '2.. ,1,7 IJ,? /,,LI.
4-Birds 0 0 tJ l.t rJtJ t7,1, 0 CJ I/ tJ,() M 1./J t> t) CJ /l,t aP tJ.t)
~-Dus~etc, 0 I I tJ.P l!JI. air 0 t? {} M ao (),/, t? '7 !l_ tJ,I, jJ,t /,I;
6-r...trlc. lnlo, 10 tl It? 1./3 t/,() iL £ t? 6 .,5,6 0.0 ,{/, l.'1 Cl/.'? 9,,41 t?,() u
7-Psydlllopc:al ? 0 ,:L /. t1.() a~ tJ Cl () l)P t?.t I},/) 2.. I 3 /.1,1- 47 ,Z,J
·- /I, 0 1.r 6.Ji t).0 /11 /,.,J. ;:; 14 /£it 0,/) If),; 7-5 tJ ~,; JU aP /'1,/,
!I-Other 7 3 //) :1.l /.3 1/.3 ? i} 2.. .2.2 .ao 2,l JI. 4- 7 7~ ?JI S:ff
Total /3.G r8' '2.3IJ 55,/ 11-11. 9 wo. 63 ,,2-f 11 £f.~ 3/J.'l Jt)(), i/f' /fS 13'1 >1/.~ 3?.~ lbO
Evaluation
0-~loon
2-Aircnfl
4-Birds
S-Cloud~ Dus~ el~
6-lnsuffic.lnfo.
7-Psychological
8-UnknDM'I
9-0ther
Total
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5"' 5£t!PA/IJ5 tJR Less t -It? Set!,::w.Ps //•ft? '-'t:1::(,,,15
Number Percent Number Per Cent Nurrter Per Cent
Evaluation Certain Dllllbtful Total Certain Doubtful Total Certain Doll>llul Total Certain Dooblful Total Certain Doubtful Total Certain Doubtful Total
0-Balloon t7 0 t) 1.0 JO 1,1) t) tJ 0 ~I, tJ.!) /J.0 I 3 ii- Jt3 17.CJ IJ.3
1-Asbonomical I 3 LL £,7 l2P,t) 11.7 /) .2. 2 tJ.O /5',:Z /'f,2. 0 0 /) /i.0 CJ./) /)./)
2-Aircraft I 3 JI 1,7 ~t) :U,'; ~ I ,II.. ,Zl,3 'I.I J6.J/. £ ., // 2£./ 7f7 #7.ff
3-Li(IIIPh"""- t) I I IJl f,7 6.'J I) tJ t) tJv /!) t{/) v t? J) ~l M (),t
4-Binls t} t) 0 t},/) /J.t) /)0 {, 0 I} /}.I) tJ.tJ 00 t) t} f) 10 t)!) t?.t
S-Cloud~ Dust, el~ tJ ,.:; t? I,{) t7.(j 0.0 {, 0 0 a~ tJ.!) M tJ CJ ;J M /JI) tJ,t
6-lnsuffic. ~to. .:z. tJ ,,z 11.?.J /J.t) l?.3 I £) I 9./ {21) 9./ 1 /1 ~ 3.7 /),t '/.7
7-Psydlololical ?1 t? ~ 17/J It M p t) t) ()./? M I,[; 2.. /1 2.. 7.7 I.I) S\''7
&-Umu,o.. 4 /J J.1- 1-?t? (),I ?t, 7 /1- £) J.L 31,4 tJ.!) l~.6.' 2._ t/ ,;2. 'l.7 ,M 'i.7
!1-0liler t) tJ ~ 0.0 0.0 [},!) I/ 0 ,0 (),t tJ,I) /),t I I ') //,3 /n 1.6
Total 1 7 IS- B3 Jlt.7 1//)t', ( 3 If 7.2, 'i27.3 Vt?CJ, ;q. r 2..3 111?.9 l.1f./ IIM
/4/ .>E4/JA,'15 • S' M,A,f/TES tf, -ft} A /AU,'7'/:S /Jve,e .?tJ M,11/vres
Jmmber PerCSlt Number Per Cent Number Percent
Evaluation Certain Doubtful Total Certain Doubtful Total ertain Doubtful Total Certain Doubtful Total ertain Doubtful Total Certain Doubtful Total
0.Balloon /, , II /f.6 //,II- 1..;-t) 3 3 ff' /3.' ff. 1.2 .? I 4 125'/) '1,3 ~33
l•ASllUnomical I I) [) t1() ;Jo t?,t? 2.. 3 5"' F.6 'l3 /3,' 0 0 tJ tJ,(J /J,{I M
2-Aircraft /3 ( 11 1-~S l[.J. IL7,7 s .,- //) l],'J IN? m '7 3 ,j 1/.7 1-,A ii/7
Hi(IIIPh9"m. C {) 0 t?/J M M .:; 0 ;J 'i,3 tJ.O '3: 0 (} t? t7,[; tJ,() 1,()
C.Birds I) 0 I) ~I, /J.0 /)ti () I) tJ /),t t?.t7 ao !) /) tJ 41 l.11 t),()
S-Clouds, Dus~ et~ 0 0 0 tJ,t, (),I) O,/) 0 {7 /) j() a IJ,/, f) 0 tJ 0.() tJ.() /},/,
6-lnsuffi~ 11111, ? ~ 'J Jl.,5 tJ.O )/;5 I 0 I ,2S tJ.() ..Z.J 7 /) ,;z. lli.7 t?.t? If.?
7-Psydlolopc:al I I .2 2: 23 II;/ C, t) 0 /),() /Ji at /) 0 C tO t',() /).I)
._ 7 I) 7 /),9 ,M /,-'1 /, 0 I 11.7 ao '/£.7 I () I j; J.O 1,j
~ I 0 I .i..3 at? 2. .'? 0 ? >l.3 PC 11.3 0 0 i} 0,/J rJ.O tJ,()
Total 3t? I.If- 1M Ci ,!f.<i[ /t,t) :;.s II 36 69.lj 3/J.6 uo. 8' ,,If- 12 Ct.'! ?33 lt?O,
238
AA/§ /7d,/p-,:!,r
?/., L./J S'°eeO.Ao1_r
Number Per Cent
Certain Doubtful Total Certain Doubtful Toi~
9 9' J( 7,5 2'J /Sv
f y IP. 7,5 #,1 //.l
?::/ IJ 3( lf.J-. 12.; .J/,?
tJ tJ /) a, At IJ,/
/) 0 i} J?t /21, t)~
I) 0 tJ I'.; j,t cw
//) Cl It? f:3 N iJ
? /) .:L 1,7 J?I) I, '7
-:?3 /) ?3 ,2.7,.5 ~I) 177,
3 .z 5' J.5 1,7 4,2
1 '! .3/ I~ 7~2 25:1 I/PO,
fi,//) _,,,,_ i-A-r..5'
?/-6t:l <e(!/7/1/t.:JS
Number Per COIi
Certain Doubtfu Total Certain Doubtful Toi~
t} O· /) 0.0 tJ.() t),0
/J I I ;J.t //. I /I.I
I .3 .If- //,/ 33,J /ll/c4
I, I I to //,/ II.I
t) t7 /) tP-0 /)t) /).0
/) 0 tJ t),t P,t) tJ,p
I t) I //,1 O,J //,/
./) 0 t) CJ, t (),/) tJ,t
7 /,) 'J 12.- (J,!) 22.i.
t) tJ £) J.t I?,/) tJ. {)
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Number Percent·
Certain Dooblful Total certain Doubtful Toi~
'l :z_ J../. .4.3 /f.3 8', I,
3 .,Z. .s- 6,7 )f.3 ltJ,'l
9' ';/ 1;z.. 119.6' 6S u/
I 0 I 17 /l,0 ,2,;.
IJ tJ /) (),0 .at? ()_(}
C [) ~ '1,t) tJ.!J at?
7 t? 7 IS::Z. 0./J /S::l..
/) t? j? p,() M ao
II tJ 1// 123.9 ao ;2,3,9
L/.. L 6 ls.7 J/.,3 /Y,{)
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I 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.