Documents / Case file

CIA-UAP-015, Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)

Central Intelligence Agency · 312 pages · text from the file's own layer

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.

  • p. 233 …0tfler 4- 0 d Ji tJ.o .r. g ;,.. 0 .2. u tl.o 1.x…
  • p. 237 Ft:Je ,/J, ,AA-r'/~A, &'F r,r/g-~/J,. .s- s~,..- ✓- -- /~-- ~ • /n () P.o…
I
I
I
I
I
I
I
I
I
I
.1
I
I
I
I
I
I
I
I
I
I
I
I
i
V/QLE ,£:lt21 E///11,UA'f/.tlttl pr /?ti- .S(6lfT//VGs E??- USS £-/,:) .5'.EC",VPS //-)'/) S ,f.Cl)~m .3/-/t? )J;Ct)/1117("
Number Per Cent Number Percent Number Per Cent Number Per Cent
Evaluation Certain Doubtful Total Certain Doubtful Total ertain Doubtful Tolal Certain Doubtful Total ertain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Tot~
0-S.lloon [, 2 L /)./,) I. I I../ 0 0 () ii},,? /J./J /J,O t ~ ..2 tJtJ 11 ?:1 C. t) t) /J,O ~/J Cl.Cl
I-Astronomical 3 t? 3 ?. I IJ.CJ 9./ I () I ,,__,; /4(7 t..1 () I I /J/J .7.k .J.t I, I I /J./7 ,;-9 5:,
2-Aircraft £ JI /tJ 1~1. 1.2. I i'/J3 5' t' 5 J'J'.1 tJ.CI .f?.3 It? 3 13 H5 11.5 15'ao 7 I 1 47- .t .,.9 ¢7-1
3-liiht Phenom. 0 I I t?tJ _f'IJ Jt) tJ 3 .3 Iti.a 1U). tJ :k).C, 0 I I tJ.o t.£ 3.& tJ / I t.J.t:J s.9 5.9
4·Birds 7 .ti 6 /../ 12./ l.t:2. ;; I I /J" /..'1 tJ..1 / t) I .U /J/J ~-! / / .:? ,,.,, 59 //. f
S-Clouds, Dus~ et~ t /) () /J.O tJ.tl Cl. t:l 0 0 t) 120 /,J_,:l tJ.,:; ~ t> ~ /JtJ /J.t? I/J./J /) /) t:? /J.,:J /J. tJ at:?
6-lnsuHic. lnrti. 2 /) ~ 1../ tUJ 1../ I 0 I t. -f ?7.o ;,,7 0 0 l) O.t) t:J.I) 11?.tJ t? 0 t} atJ l'?/J OIJ
7-Psydlolo1ical I} 0 t? f1/J 0.0 17. tJ t, 0 {) tJ.r? /J. t} tJ.tJ t) I I ,?/J .J.f f.,f /) t) tJ eJ_,:J /J /J t!ltJ
&-UniuN>lffl 7 () 7121.2 tJ.O 211. If t) );- 141.,i tJ.tJ 1,.1 7 t? 7 ?L..9 t1/J :2..? ., r) s 194' at? 29.4'
9-Qthe, ? 0 2. /..; 12 0 I../ 0 !) (} 1ic. /J,/J /J.CI () 0 tJ /],., ,1;? /?.l:J I) t? ,::;; IJ.0 t'?.tl (1.,:J
Total 2-2 II '3J U.1 f?_J' /Pt?. I/ .If IF '1.1.! /Jl..1 /&12 If 1 /Lo //U .tas l,1111 13 II 17 11¼5' U.£ /t?t>.
6/ 1EC"Moc - f /1,f/A✓nrEi'dr//J,'/ A/Ar S7,A7Tn"'~
Number Per Cent Number PerC01t Number Per Cent Number Per Cent
Evaluation Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total ertain Doubtful Total Certain Doubtful Total Certain Doubtfu Total Certain Doubtful Total
II-Balloon I 3 /f I.~ ,It /. q .) 3 6 «1 /,lg lit 6 !) 6 /2.1 ,1t) lt.f s t) .J 5.5 t?.t? 5.J'
1-Astsonomical t) '7 .2- O.o ?.? .?2. ? 0 0 /J_O /J.CI ,,_,,, 2. _5- 7 .t/.g ,/J_t, //If I 3 Jf /./ ?. .2, 4:3'
2·Aircraft /:2.. Jo .2.2. IU II.. I p;_,; '{ /S' ?:? li.9 2,/.J, .11.I I I 'l_ ~-1 ~-1 4,2, I ff 4- ?2. 1:1_t; ,( z. :U./
J.liiht Phenom. I ? 3 II. .:t.J, .t/.f .2 2 /f- .?2, ft t,..1,1 /) /J I} IJ I) 120 /J.O / t/ I /./ t?. t) /.I
4-Birds 0 I} 0 /) /) /J,d ~I? 0 I I /J.17 I.I, 1.t, /J 0 0 /JtJ t?/J tJ. t) ? / 3 2./ /.I .i'. 2.
S-C1ouds, Dus~ etc. t} t? /') 12/J J?.a /J '" {) t) t') 17,I!) /] /) t).t) 6 !) 0 ,2/J /} I) l!J./J 0 tJ ~ /J/J /) /J /J CJ
6-lnsuffic.lnfo. 7 t? 7 1/.J ,0./J Ill. {( /Cl (J /IJ 11..I /J.d /1..I 2 /J 2.. ¢. 2. ;J.{) z/2, .M t? ~ 2(./ /.l,O .2/.I
I-Psychological £1 I I CUJ l.t, /,t, 0 0 0 /J.IJ ,7_ IJ /) CJ !) I I ,J,? ?./ .2.I I / )._ /. I I.I :Z.2.
8-UnknOMI ,t../ 0 12--/ .lf.9 11.0 1.5.! q /5" 0 IS- 14..t tJ./J ?/6 H ,-,,,,G EL..E '£IP ,,,, M/JPE /1d/Eers
~ 5ECLW£' b,I /)/. ao ,!} I I C.11 33.3 33,3 0 /J {) tM tJ.t) t?v
2-Aircraft I .7 f /Pv 'Mt) J;J.t I IJ I l33,3 t}.O 33,3 C) 0 t? 1).0 0/J t).C, I tJ I /.,U /1.{I 1,2,5
3-Li!lhlPh.-.m. t) £1 !) /)() /).0 !111 C t) t) /J.0 ~C, t?.t tJ 0 IJ t?.() (),tJ IJ.O ,1 I) {) M atJ tJ.tJ.
4-Birds CJ IJ /} ft t?t) (}.t I t) I 1~3 0,[, 33. 0 I I 0.0 3'33 33.3 LI-- t:) /f- QJ,;) /J,/) ~NJ
5-Clouds., Dust, etc. t) C? 0 l).i (?_() ()(, v ,:;? t) /)(. t}.I) t!t) .c 0 !) IJ,/, tJ.11 tJ.O (/ C? 0 /), t ;J.j t?.£
6-lnsuffic.lnfo. :? 0 3 30. t 0.C 3tJ.() ? ,!} 0 tJ.O /JO 11, v 0 t) ;J./, Jt) 0.t tJ tJ 0 ()_ I JJ() /),j
I-Psychological C? .c tJ o.t /J.() t}.t t) t) IJ c),/) (Ji (),11 {} I I IJ.() JJ.~ 33,; t) tJ t) {?/) I)/) ,1.1.,
a.unknown 3 0 , ?11.t IJ.P 1/1.t tJ t) 0 (){) ~/1 IJ.(, () t7 0 0,0 O.D a() J' tJ 3 31,J' ao 575
9-0ther tJ tJ /) C,t a;; ;Jt, tJ v ~ ar: tJt 11.t) I) tJ t) ac- O./J 0.0 I') tJ 0 at1 I{/', tJ.;j
Total 7 1 /{) 'lrJ.11 3t)t} ltJf.l. -; I 3' 6t.7 3.?.3 Wt?. 0 5 3 tJ.o IM/J /tJtJ. 1 0 ,( 1/t!t:?t ti. ;J /.?'A
I.I 5..:-,~•-A'"" A•t/res ;,,. go fa ;ll)vrc- s /J11J;R 5'CI M111111res l),1,e11ntJIII 11/tJr S:r/17ep
Number PerCmt Number Percent Number Per Cent Number Per Cent
Evaluation Certain Doubtful Total Certain Doubtful Tolal certain Doubtful Tolal Certain Doubtful Total ~•rtain Doubtful Total Certain Doubtful Tolal Certain Doubtful Total Certain Doubtful Tota
0-S.lloon CJ 0 C tJ.t /t t111 I t? I /,ZS j},tJ 1.23 ;; () t) t?o l-0 /.tJ u t) t) ,?/) ,?_ /) /}JJ
I-Astronomical t, I I !?.£ tl/ cl,/ 0 I I iJ tJ. /,2,, ·;;,__,r h t) 6 IJAI) M 2.,1/, I 0 I .t/5 /J/J ✓.:-
2-Aircraft C, 2.. ,:2._ tJ. () 1(.2 l/f....t. tJ ,!} ~ M /},{, tJ.t ;; I I ~/, 3,3 J,J ;J I I /J /I LI,< 4.-,:;
3-Light Phenom. () /) 0 tu t)./, /1./. ~ (/ ? I.U.Z ;J,() '1.,a I IJ I 3.3 a, 3,3 t? 0 t) IJ.tJ o.a /)/)
4•Birds I 0 I "I.I tJ,/. <?. /? 0 0 11.t 11, (),1 I) ;J ~ ~11 At tJ.11 /) 0 t) /)/1 /J /) ,'l/?
~Clouds, Dust. etc. /) C' (} ti,/) tJ /, /}.t ~ /,) 0 /JI. at tJtJ ;J /,) 0 M cw tf.11. t /} t) /);J /J.£1 12/J
&-lnsuffic.tnro. 0 r' 0 t) l tJ.;, 11.t'. I tJ I 11.2, tJ.rJ /;z_, /? tJ (} /J.t t)j t)./) 7 ,::? / 11.t /J..-i .?Ix
7-Psycnolocicat () I} 0 ().1, ().11 I)_() ;; t? /J tJ.(, /JI. tJ.t I 0 I :J.3 tJI) 33 ;t t} ~7 lj_/ 00 f./
I-Unknown # 0 ~ Ult tJ.() 3t:J 3 0 ..:f g'l,.[ '2P '17,5 ., I) ;? 21! ff.7 tJ,/) ttf. f /,J ' .l,l'tJ 9 /J.O ./4.9
t.Olher ? /) ? 2?,~ IJIJ 77.< ;? 0 0 "-(, /?I) N; 0 I I to 3-i 3 f' I/ '. I?. I ~t? 4./
Total '(; 1 I/ ,'7?" 1-? '7, 3 )/?~ 7 I 9' f/7,.5 as 11a 2.% ? J6 9.,?,.3 ;;','} /?'C,) l---1 I ,2_-7 'f:5'.5' ,:/5 /Ciel.
233

Cases discussed

About this file

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.