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…
Ft:Je ,/J, ,AA-r'/~A, &'F r,r/g-~/J,.
.s- s~,..- ✓- -- /~-- ~ • /n () P.o /J () l.tJ
6-lnsuffi~ ~lo. I 0 I I.!, O.tl I.J 3 0 .3 ,f/t/. II. 0 1/4
7-Psyd!Dlo~131 ,, ,., 0 O.t1 P.O P.o L!) 0 0 tl.O ,.o ti.ti
1-- 7 ,. 7 Q.I 0.tl 9. I
' i!) I. 11.f /J.IJ 10
!1-0lh" -~ I 4 .I. 'j / . .1 .r.:2. t7 t!') ,,, /J () /.I (J ,Pf)
Total Jx .H· -n 4t.~ J1Jt Voo. Is /II ~.2. J'LJ 4H loo.
t:J s..,-~-,V.k• • s ,H_Nv-~ r.-.w M,~--r~.,
I Num~ Per Cent Number PerCmt
Evaluation Certain Doobtful Total Certain Doubtful Total Certain Doubtful Tola! Certain Doobllut Total
~Balloon /J" /~ :n J✓,t 11.'i .f4.7 /,f /2 .Jo lf4 /,).'/ i1.~
l·Astronomical :2 .? .1· 2.1 3.,.. :.:.? /11 4 14 ,,, g 4.,. I/. I
!•Aircraft /(J f If 1/P. ..I ,I.ti lf'I .! /o I~ ../.l. JP.i /4.tJ
3-Liaf,tl'llenom. ti (J tJ t)/} t7.o /J A -2. 4 C .2..1. 4.3 t..J
4-Binls
" 0 tJ 00 00 tl.o ,'J (? D /.l.() /J.o IJ.n
S-Cloud~ Dus~ et~
" ., 3 /)_/J .J.2. .J.2 6 0 0 P.O (J.O IJ 0
6-lnsuffic.lnfa. ..r 0 .r ,,. ' tJ.o .r:1 1 0 1 1.1· ().O 1.,-
7-Psydlolo1ical / I ~ I.I I.I ..?.2 .r 0 .1' .r.4 P.P -~4
8-UnknD• .:TL" 0 ,7, 27.,1 /} 0 )1.4 // 0 //, 1111 /J.o 1/U
!I-Other .J 0 J .?:,. t).O .1.2 .,2 0 :l. ~,, tl.P ~-2
Total £_;i, 13 9S' t.r:.z 14.1 1/IJp, u Jo 93 t,7-'J J). .3 /A(J
:1M'?e ,£/ff.r
Fat!- "' 'T/OM ,., /
. I 4.J' PA d.r ,t7 0 0 ,,_,,, O.o t/0
S-Cloud~ Oust, et~ t) 0 0 0 L1 /J, (J /1.o
" 0 0 P.o o.o IJ 0
6-lnsuffic.lnfo. / 0 I 4,. P.P Ir / 0 I .(3 o.o .n
l•Psycholoaical / (J I 4.J 0.tl -1..r- p 0 0 /JO O.IJ /J.o
8-Unknown I 0 .? /J.I. /J,tl /.J.{.. 4- el 4- 1..21.1 d.O l,,2/.J
9-0ther ; 0 2 qi A.0 q_ I
" t:1 0 (1.11 tl.0 PO
Tot~ 14 3 ;2:l 11.3 t J/.4 ,,,.,. J-1 (, /9 ltf.4 .!IC I/Pd.
,{,/ ,,.__ ~- - ,.S
Number Per Cent
[;ertain Doubtful Total Certain Doubtful Total
I ,2 ~ .J./,. .r.~ 7.'I
✓ ~ 7 J:I '.) .r? 1rr-
.,. ~ II /3.). l.t:K 14'.o
,., / I h./J ~/ ~-'d 0 It /7.0 Ro ,.o
" " " AO p " d.()
4 0 4 IAJ AO IP✓
" 0 0 "0 tl.o I.()
/(J 0 In ,,, ;: il.O ~t.3
,.2 0 ,2 f.~ l)_t) f.3
1..27 II .J,f 71.I :219 Inn.
/),,r~ ~- NI. ✓vrr~
Nu~e, Per Cent
~ertain Doubtful Total Certain Doubtful Total
f ? ;/ II.I. 1o .u.t.
/I r I I. 1..u1. II.~ ~1..:;
-2. I ? 4.1 ,l,3 1o
() 0 p P.o 11.0 /Jo
(?
- t) ,1.(J /).0 A -
/2 0 t) t7. (J DO O.o
" (J /) IJ./J tJ.0 /J(J
0 D t) IJ ti b.O ,f()
II 0 II 2.r:1.. A.O ~,.,
,.2
" .2 4. 1 t/.t> J..1
UJ q 4~ 19.1 ,1().9 /IJIJ
r. ,,., //- "- -.., __ K,.A'I'
Nurrtler Per Cent
Certain Doubtful Total Certain Doubtful Total
I ..J 4 Jo I,. I fl
/ e> I ,1.(J .1/. IJ 2.o
/,! /J' .B u..1 3o,t, 11.13
/) 0 tJ ,,,,, AJ1 tl.O
p 0 0 P.o o. o .IJI)
,1 () 0 ti (l O.o AO
/ (J I .t.o tJ.o :?. "
,,t I .5 41 ~.o 1,,./
7 0 '] 1,~3 /JLJ 14.!.
,? (J 0 IJ~ 1/.IJ A.O
.?o J(j 1-'I to. Ji..l /t)().
,n, ~~ ,, ,.,,_,,,, ____
Number Percent
ertain Doubtful Total Certain Doubtful Total
t 3 9 .:No /;:/.0 ·~-"
.3 ·I 4 1.2.tl 4.o 1/t...o
I 0 I 4.o A,0 4.o
() 0 0 ,.o D.O 11,0
,!) .LJ ,>7 tJ.'1 "·" o.o
/ (J / 4o d.o 4.o
" 0 0 0.0 P.o o.o
j 0 1 ~A ()_,:, i(J
'? a 1 '19IJ '1.0 ~r,,
d I I "" 4.(J 4.o
:Zo 5 2r ltJP , I J.o ,1.17 J.o
~., " 3~ ~~4 /). () )d
..2 I g I. 'I I. 0 u
-r4
" ;t.4- ;1J.J tl.O ~J.J
4 0 4 3.1/ (1.0 .J.t/
3.s- 13 I/A.f S;l,J 11.( /00.
J s
~I-Lo c:. ,.~,,,.,.,
Number PerCmt
Certain Doubtfu Total Certain Doubtful Total
.2 A 4 ..n .r. .3 111.,
" (J 0 tl.t' IJ.t'J (J.()
/.r /. ;u 3-,_J /J"K I - ·"'· - ...S".,..-..dr~n.
Number Per Cent
Certain Doubtful Total Certain Doubtful Tot~
.l.d 3 13 1/9 .u. 1.r:J
/ 3 4 /.,t 3.t. 4.!
11/ 4 2.3 J,.t. 4-.I .11d.
I 0 I l.2 ,P_(J l.:l
(7 I I tl.o /2 I.A
t:J tJ d tJ.o tJ.o ,,_,,,
..:lo 0 ;,o 2.H tJ.o W.t
I () I I., ,§_ t) /~
/✓ ,!7 /.r /'7tf 4'.0 117.'i
' ,!) I. ~I P.O 71
1.J JI 14 IU9 /3.J IP/7.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

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.