PROJECT BLUE BOOK

PROJECT 10073 RECORD CARD
De SS ee eee nn ee
2. LOCATION 12. CONCLUSIONS

2 (

Jon 51 Stockton, Calif a Prcbshir Dalles
DATE-TIME GROUPS 4. TYPE OF OBSERVATION O Possibly Balloon
a eS CD Ground-Vi sual 0 Ground-Redor a pote av Be
cur___Not_ Reported 0 Alr- Visual C Air-intercopt Redor | 9 Possibly Aircraft
PHOTC 0 Was Astronomicol
D Yes omen er a Probably Astronomical
0 Ne pecinen lian ossibly Astronomic
6. NUMBER OF OBJECTS | 9. COURSE 2 Orher__f@et Air Balloon
O Insufficient Dota for Evaluation
1 n/ A 0 Unknown
10, BRIEF SUMMARY OF SIGHTING -_ 11. COMMENTS * or
Object red and green descended upon Naval Analysis of residue we feel that object
supply depot, exploding on contact with was Hot Air Balloon.

ground, Partq of residue which did not bust
was sent to FBI labs.

ATIC FORM 329 (REV 26 SEP 52)

ek a hs
| f FS eet L WN say ‘ ASSIFIED > : Y~
ROUTING AND RL JRD SHEET ‘A MATERIEL COMMAND
Ure thes form for inter-olfice correspondence Use authorized office symbols to designate Place initials of dictator and typist, telephone
withia headquarters, addressor and addressee. number and location to right of signature. -
Number all comments consecutively. : Note warning signal at lower left of form. | UY
. "Remaining «pace its sufficient only for
Use entire width of sheet, both sides, proper spacing of typewritten signature. Segarate comments by herizental lines across pa
aa een Object Neported at Stockton Naval Supply Annex, Stockton, Calif. Ge
u —s
to} 0«6NCT FaOM =) ICLP DATE }) April 5] COMMENT NO.

1. Reference is made to R&R of this office, dated 15 Vebruary 1951, forwarding
copy of letter dated 12 February 1951 from OSI concerning subject matter.

3
es)
2. Attached hereto for your additional information is letter dated 26 arch 1951
pertaining to same subdject. 4
%
Bly tape LPGP
1 Inel aR LARD TE er nohaes /vad
Ltr dtd 26 Mar 51 fr 5D OSI Colonel, USA? “-),112
Air Provost tiarshal P1R
Tee eee 3 ee Bee ee Inspector General's Office B 262
‘we, iy lg TS ieee
“x
<3
=
re
onl
Ard
(Za
gt
oe DOWNGRADE: i AT 3 YEAR INTO sie Nit
weatet G\FIED ECLASSIFIED AFTER 12 YC.
UNCLAS ss POD DIR 5200.10
VTS FER a9 4 Al 200M (CONTI ON OTHER SIDE)

AMC Form No. 5 (Rev 29 Jul 47) —_ a This form reploces AMC Form No. 10-3, which will

he vied until stocks on hand ore exhausted.

= acl

( UNCASSIFIED

Cops
4 ; 7 Tio er tt.. f
" ‘

HEADQUARTERS UNIIED STATZS AIR FORCE oe
THE INSPECTOR GENERAL |
DIRECTORATES OF SPECIAL INVESTIGATIONS Jas }

WASHINGTON 25, DC. \ } a s*

p 7 February 1951

MSMORANDUM

SUBJECT: Balloon-shaped Object Reported at Stockton Naval Supply Annex,
Stockton, California, 1 January 1951.

A reliable government agency has furnished information to the
effect that on 1 January 1951, a red and green balloon=-shaped object
reportedly descended upon the Stockton Naval Supply Depot, Stockton,
California. This object exploded upon hitting the ground, but a part of
it remained to burn fiercely until extinguished by Naval security guards.
The residue was recovered and has been transmitted to the FEI laboratory
for exanination,

. No information concerning the origin of this object is available
other than the recovery of a bambo ring from the debris, which would suggest
the possibility of tropical or oriental construction, Additional information
will be forwarded upon receipt. (E-2)

be am & WWreATpy TNT > \L.S3
WNCORADED AT re a . 1d of “% rr A TCs
on DECLASSIFIED z\ | . ‘tse Le ¥ Mae Rb.
: POD DIK 5200.16
ee 4 mac r NEVA CCICIC .
. . —* . F =
Sas 26 WNCLASSIFIED.

be am MASTS EE eee

fi
e ‘tah . fhe P fe ti
RA 25-653

ee Ae on

(Unclassificd) WIKNOW SUBIECT: Dalloon-Sshaped Oyject Reported at Stockton
Naval Supply Annex, Stockton, California,| % January 1951.  SABCT AGS

Directorate of Intelligence, Coliection Div, Documents
and Dissemination Pr

B FER ISS!

Counter Intelligence Div, Directorate of Special Lt Col Darnard/abvl/71776
Investigations, ‘The inspector General LYCSI-6

1. The attached commnication is forwarded as a matter of interest to
your office.

2, This information has been disseminated to G2, Amay, Oli, and ALC.

1 Incl CILPSRT R. Levy
Memo dtd 7 Feb 51 Actg Chief, Counter Intellisence Div
re above subject Directorate of Snecial Investigations

The Inssector General

®Attention is invited to the fact that the Information contained
herein has been dcrived from sovrcet olde than USAY. In accordan:-

with Par Sb, AFR 205-1, dissemination of the informution contained
herein must not be made outsides of USA} channels.”

When Loci is» Pa. i in (are) withdrarna
or not gttasyes ? 4*ss O8Qhs * et eSF¢ Fen of Dincloaure of ia neture, mourees, or even the existeece cf suck
Aimdadh on this coorczpondonce Saas nee en it jane mentioned In the report
= a pT ¢ P Hons net morrcily entitled to such information
19 cancelled in accorcacanuco Wis thay be wmode only whon expressly authorized by the Director

ol Special Lavestiy ations, iG, cr it sathor!
par 250, ATR 205-1. HAet authority,

WACKASSIFIED
DOWNGRADED AT 8 YFAR I
DECLASSIFIED AFTER 12
DOD DIR 620, 0.

NTE!
YEA ARS,

iVALS:

- ROUTING AND RX 02RD ar |

Use thie form for inter-office correspondence
within t:-adquarters.

Number all comments senentailieiien,
Use eutire width of sheet, both sides.

Use authorized office symbols to designate
addressor and addressee.

Note warning signal at lower left of form.
Remaining apess is sufficient only for
proper spacing of typewritten signature.

suasect

Te OG

UNCLASSIFIED ,
| MATERIEL COMMAND

\

Place initials of dictator and typist, telephone
number and location to right of signature.

Separate comments by horizontal lines across page.
Balloon-shaped Object Reported at Stockton Naval Supply Annex

Stock ON» Calif.

to} 0 NCIAXA-/ew From 1) CLP

ffice of Special Investigations.

i . VY

1 Incl
tr fy 5D OSI d&d 12 Feb 51

i ALY at A ©
Colonel,

DATE 15 ob 51 COMMENT NO. |

Andi I i / ve
USAF =), Red

oe cs Air Provost Liarshal P1R
eg ee we se Inspector General's Office B 262
i
—_
—_
a
Lhe
we
—
Vv
hy
| \
e

powxcrApEd At 3 YEAR INTE ee
DECLASSIFIED AFTER 12 YEAS

UNCLASSIFIED.

WF-L-15 FES 49 4 Mil 260m
AMC Form No. 5 (Rew 29 Jul 47)

DOD Vik 6200,19

This form vegraeee AMC Form No. 19-3, which will

be used vatil stocks on hand are extausted.

UNCLASSIFIED

QupRS STAY 5D-OST/STJ/inain

5D-25-0 , 12 February 1951

SURJECT: (Unclassified) UNKNOWN SURJECT
Palloon=-shaped Object Reported at Stockton ‘iaval
Supply Annex, Stockton, California, 1 January 1951
SABOTAGE

TOs ~ Commanding General
Kir Wateriel Connand
Wright-Patterson Atr Force Base
Dayton, Ohio
ATTN: ‘CEP

1. The following information is forwarded 3s 2 matter of interest
to your Headquarters:

A reliable governnent agency has furnished information to the
effect that on 1 January 1951, a red and green balloon-shaped
object reoortedly descended upon the Stockton Naval Supoly
Depot, Stockton, California. This object exploded upon hit-
ting the ground, but a part of it remained to burn fiercely
until extinguished by Neval security guards. The residue was
recovered and has been transmitted to the FBI laboratory for
examination.

No information concerning the origin of this object is available
other than the recovery of a bambo ring from the debris, which
would sugzest the possibility of tropical or oriental construc-
tion. Additional information will be forwarded upon receipt. (P-2)

2. Attention is invited to the fact that information contained
herein has been derived from sources other than USAF. In accordance with

Paragraph Sb, AFR 205-1, dissemination of the information contained herein
must not be made outside of USAF channels.

PNGRADED ‘AT 8 YEAR INTERVAT®
OM ECLASSIF' ED) AFTER 12 YEARS.
DOD DIR 5200.10

C JANES FX. O'CWNELT.
8) Colonel, USAF
P District Comrander
Sen
Sag

conspanra  ‘NCCASSIEIFn

IN REPLY ADDRESS BOTH
COMMUNICATION AND EN-
VELOPE 19 COMMANDING
GENERAL, AIR MATERIEL
COMMAND, ATTENTION FOL-
LOWING GFFICE SYMBOL:

MCIAXA-1a

-

1.

| WNCKASSIFIED | sain
—-GOoN ett SAE ¥ MS |

HEADQUARTERS
AIR MATERIEL COMMAND

WRIGHT-PATTERSON AIR FORCE BASE
DAYTON, OHIO

MCIAXA~1la/JIR/eps

Unidentified Flying Objects (Project 10073) 26 FFN 17"!

Director of Intelligence
ATIN: Evaluation Division
Technical Capabilities Branch
Headquarters USAF
Washington 25> D. Ce.

Your attention is invited to the inclosed copy of letter dated

12 February 1951, received from 5D-OSI, this ccmand, pertaining to the

subject.

This matter has been investigated based upon the information

presented, It was found that typical high altitude balloons often in-
corporate an explosive cap for the purpose of disconnecting the mechan-
ical equipment used with the balloons at a predetermined altitude,
Malfunctioning of the electrical circuit may explain the explosion ex-
plained in the inclosed letter,

The personnel connected with high altitude and weather research

at this command have no knowledge of any bamboo rings on the various
types of balloons now in use,

36

Hq AMC Form No, 9 (Rev 8 Fob 49)

It is requested that action be taken to obtain additional de-
tails on this incident end this command be advised accordingly. .

FOR THE COMMANDING GENERAL: \

Lb 4
s Vile, bf osar
1 Incl: t eee

5D-OSI ltr frcoiozel 9
(5a-28-0) atd 2-12-51 Fie oper anions Analysis Division

Intelligence Department’ Dey ~

» nee
as 4 ve.
a singe? e
UWNGRADES Al's YEAR INTER VAL! ie ree =
180 Obl ASSI* rie ) AP’ mie Dee 2 YEARS: C : oi 7) ; y
€ Ll). pik 520 ae =. rs
bo ; . \ i “33 Ss 3
‘ — \om 4 mae
- 4 j ant a <  l
e SOneiperrest Ora

WNCUASSIFIED Air Poree-WPAFS- 1-3 SEP 50 1200M

a :
e . . — ieee > we

\ | . 4 : UNCLASSIFIED. Ps AFRSOL37
pam

J 25-653

(Unclassified) UNKVOWN SUBJECT; Balloon-shaped Ohject Renorted at Stockton
Naval Supply Annex, Stockton, California, 1 January 1951 -— SABOTACE

Directorate of Intelligence, Collection Div, 9,1 tiAR 139)
Documents and Dissemination branch

1
Counter Intelligence Division, Directorate of Lt Col Barnard/1n/53623
Special Investigations, The Inspector General fPCsi-6

1. Reference is made to R2R dated & February 1951 in the abovw captioned matter. |

2. The VBI has advised that a laboratory examination of the evidence submitted |
reflects that the "balloon=shaped" object was probably a homeemade "hot air” ballom, |
No fingerprints of value for comparison purposes were found on the bamboo ring and
nothing of particular significance was noted with respect to the wires and other
materials of construction which would suggest a possible source for these materials.

3. The Aix Matericl Command has been informed of this matter,

GILST R. LOVY

Actg Chiaf, Counter Intel Div,
Dir. of Special Investigations
The Inspector General

DOWNGRADED AT 8 YEAR Iwrepu.,
DECLASSIFIED APTER ptt :
DOD Dik 6200.19

+ oo ene le Cl ee Ce eS
.

ne i eee ee

one LAD a ce é
- . - ’

CSAS ENA.
( e+e er 5 Ei eeest . {
na

UNCIASSIFIED

Basic ltr fr ANC to DI/USAF, dtd 26 Fob 51, subject: (Restricted)
"Unidentified Flying Objects (Project 10073)"
AFOIN-v/TC lst Ind ward 7954

Dept of ths Air Force, Hq USAF, Washington 25, D.C.

rp f0: Commanding General, Air Materiel Command, Wright-Patterson Air
Force Base, Dayton, Ohio, ATTN: Chief, Intelligence Department

Technical Capabilities Branch was informed by Office of Special
Investigation that the residue from the burning balloon has been
examined by the Federal Buroau of Investigation. A leboratory anal-
ysis of this residue will be made. Conclusions of the Federal Bureau
of Investigation will be forwarded to your commend when availablo.

—_ ee

BY COMMAND OF THE CHIEF OF STAFF;

1 Incl

. 77) L9 om a f s » ° I
“se8l Cowapllities Branch

+e
tes C9 ' t ;
Eve 4 pa Bs ‘an itn

Dirvctorate of Intelligence

152i

BR Ut

TH:

BOD PIR 200,10 -

\ ’
\ :

_——_—_.
——_

‘ ———.

‘a bt ad Pe tad A ee VIACOM AR CCIM:
Costipee=: (UNCLASSIFIED

-

TRY CLASSIFIED
5D 26-0-79 26 ; arch 1951

SUBISCT: (Uaclassified) UNMIOW! Svsdtcr
Balloon-shaped Goject neported at
Stockton Meval Supply Annex, Stockton, California
1 January 1951
SALG LAGS

we Commanding General
Air Materiel Co:manc
Wwight-Patterson Air wvorce ase
Dayton, Ohio
AT&ts LGoP

1. Peference is made to lotser, this office, dated le reb-
ruary 1951, file 5D 28-0, subject as above.

2, ‘the following additional infermation is furnisheu as a
matter of interest to your headquarters:

"],. On 1 January 1951 a rec and green ballcon-
shaped object reportedly desceided upon the Stocicton
aval Supyly Vepot, Stockton, California. unis ovject
te:pleded! upon hitting the ground and almost disiue
terprated, but a part of it remained to ourn flercely
until extinguished by NSD guards. ‘he resicue and
other evidence of the "balloon! was forwarded vo the
FBI laboratory.

">, ‘Ihe sederal Dureau of Investigation has ad-
vised that examination of the evidence suowibtsed re-
flects that the object wus probably a hone-made "hot
air! balloon. No fingerprints of value for compari-
son purposes were found on the bamboo rings which wes
amon: the debris recovered, and nothing of particular
significance was noted with respect to the wires and
otner materials of construction which would sug7est a
possible source Sor these materials."

3. Attention is invited to the foct thal ‘aforrmetion contalued
herein has been derived from sceurces other than USA“. In accordance with
paragraph Sby AVR 205-1, aissa) ination of tha information contained here-
dn rust not be made cutside of USAN channels.

-. . ~ a. | ~“,- . e x * '
Wei oD Ye Ae \ ' U bo ear babs
Colonol, USAr

intent ad nv An
wLSLLCG Uo ander

__ DOWNGRADED AT 3 YEAR INTERVATS:
NINCVASSIFIED — DECLASSUIED APTER 12 YEARS.
\

DOD DIR 6200.10
eT ts ‘
; aii eee |

—=_— ... e :
ee