12. CONCLU:.IOHS . PROJECT 10073 RECORD CARD .f. { 2. LOCATION ~ Calif 0 Wa s Coll ot>n OC ~.~on, 0 P robubly Bnll oon 0 Was Aircraft 0 Ground-VIsual 0 GroundRodor 0 Prob obly Ai rcraft 0 Possibly Aircraft GMT_ llot Reported -s.~-=P~HOTOS D AI,. VIsual 0 Alr-lnterc p t Radar 0 Was Astronomica l 1. LENGTH 0,. OISIRVATIOM Not Reported I. NUMBER Ofl OBJECTS 9. COURSI! 0 Probably Astronomical 0 Possibly Atronomlcal a Other n,;t. Air Ba.lloon 0 Insufficient Data lor Evaluation 10. IRII' SUMMARY OP SIGHTIMO 11. COMMeNTS Object r ed arrl green des cended upon Nava l supply deJX>t, expl oding on c onta ct with ground. Partq or resi du e \'lhi ch did not bum lias sent. to FBI labs. ATIC POHM 529 (itBV 26 S&Jt 52) Analy s i s of r esidu e He feel that obje ct wa s Hot Ai r Balloon. ROUTING AND tlae at1Mtrlu4 N eyMIIHtiJI to 11.-I.Rate Note warah alpal ' lower left of for. a. ... el~tllllf PMe l" awfldeflt "'" for pn.per "'" of t,.pewrlttew '"tr. A MA'J' .. ~JUEl, COMM ANn Plu Initial of 1~11-r a nol t yplol, l tl,.llh"nt nwm~r nol IKatioon I rlaht of alanlr .ko~orted nt ~tockton l!ava.l ...>ul.?pl y A.'I'J.nex., Stoc'd;on, Gnlif . lblloon-shaped Objaot 1 Janu ary 1951 DATI 4 April 51 CO MMiHT NO. 1. Ref or ano11 is made to R&R o f this oi'!'i o e., datorl 1 5 Vobr ua.r y 1951, for.va~Mng oo ? y or 1oti;er d a tad 12 7obruary 1951 from OS ! oonoernln;~ subj oct matter. :.;, 2 . Att \.Ohed h e r e t o for ~rour addi t ional i n f orma t ion ir; 1 ett~r dat,~d 26 ;arc.,a_ 1951 partaini~g t o same snbj e ot . l .. t r d tcl Col o"l e1, li.">A Air Provo:~t ~ ~arshal P l'!t Insp e ctor Goner a 1 ' s O:'floe H 262 Thh f:~rm replocot AMC ''"' Ho. 103, ... hi<tt will btt u ,od until llttc" Oft h .. nd oro ... houotol . Ul:. SIOIIIATUIII IN .\I'YIIOMPIATI BlOCr C l, CO 0 1 Dt:I'UTY INS~fCTOIIt OfNl'S PUIILIC INF. O FIICI COMPJIIOUEit PERSONNeL & ADM. ltESUitCH & DZ:V. PROC. & I'JD. MOl. A~\C form N.,. I \hlshingl:.on 25, D.C. l3 'l:J.1.'H l i J Cf n- TU ff~Q\.SS rt.\ E.~. ARIA COMMANDS Will liN'! I>U1' O(UO. flU C OP'IES TO I INITIAlS 0'(0ANilATIONAL TITlE N 0 T OF;;. SY/,&Ol API'liCA:UI W HI N A:>DITIO~IAl UCOPDS SEC. A<;;O SPACI IS NUOIO IN COORDINA liON ILO CI( JUADQUARTERS tr.JITED ST ;\rzs Am FO:lCE TEE !iJSP~TOR Gl:NERAL DIRECTORATE OF SPZCIAL I::vESTIGATIOiiS WASHII!GTON 25 7 February 1951 SliBJECT: B3.lloon-shaped Object Reporte d at Stockton Iraval Suppl;r Anru~x, Stockton, California, 1 January 1951. A reliable government agency ha s furnis hed information to the efec~ t hat on 1 January 1951 a red and green b~loon-3haped objact reportedly descended upon t he Stockton dava l Supp]Jr D>Jpot, Stockton, Co.l ifomia. '!his object e~q>loded upon hitting the ground, but a part of 1 t. remained to burn fiercel.1 until ext.ingui::.!":e d by t!n.vaJ. s ecurity euards. The residue was recovered and h~ been tran3mitted to the FBI la.bor~tory tor examination. No iPo~tion concerning the oriGin of this object is a vailable other t han the recovery of a bambo ring from the debris, \lhich y,ould suJJest the possibllity of tropical or oricn~1U construction. Additional information will. ba for\1arded upon receipt. (B-2) ( Unc1o.aail'l od ) U ... iK.iiO'.i11 Slli3-"iZC:: l:n.l l oon-hnpe d .... ~;!~ct. !:::;port....~ ~:t Stoc!d.on I:a va.l G:.t .. ~1:>1J ! ... nne;{, Stockton, C:_J ~ fornl:l Di.r0c t or nt.e of I n i:.-~J 1 i .:;on ce , Colle c tlo n D.i.v, jiocu.:~0uts c.nd Pi . .J.3e_tinatlon E:r Lt Col "B='.r.tJXd/abl/'('1'/76 1 . ? he nttacheu cc:nun.ication i o fo_ ... :f::u-ded ;..~o .:1 : ',\t i:,()r of i:.tur st to .rour or fice. 2 . Thi3 infor.tation Iv.;~,:; Leon dlooeuir:~t-3d to C- 2, .u~zy., Oifi , .:!.n d r_;_c. H~r.!O d t d 7 Fob 51 r e above su') j.3c t f.c 3 C tief, Co.mt~r L"ltolli~:~nce JJ:.v Dir~ctor.:-..t:.~ of .S:)cc ial Inre:3tl:;..lt.lonJ ?i~o Inc .. ~ctor G :n: r al .Attention i s invited to t a f.:tct t~.''l.'i. t ' j f' with Pur b, AF t 2 0::-1. llls;; ::l.i 1: ~..:.c! c: t!:~::; in!'crmution coutninod h e rein must 110t be u:ndo out:.;i.d.: oi' u:..;.\:.' c:wnnel s . a ROUTING A~D Rf Jli""r all ce-nta -.-tlreiF. l:ao entire wl4&h af ahn .. "'" n~ lloon-t;~!R!I~d Ciljtct Note "''" laaal at lvwer left .t fora. ..aalallla IPMe I aaflde11& ,. 111 fer " .. " apael"a of c,pewrltteft lnhl,.. tJNCLASSlFJ !::() 4 1\IA'l'EIUEL COMMAND l'lue lnltill of 41ctalo r and t , pltt. llrphune ulter and loc-atloft to rll'ht of lanlurt . COM'HT HU. 1 Att:l.ched hr.reto for your infor,'\!,t, ()n O.:: .rlo o o.f Spociul Invcst.ica.~ions. Air 1-'rovost .arz nl -:= \(.f}fie~L:Frfr~1' -WflU ffl 49 4 Mil 2~ (CONfiNUE ON OTHE~ SI Ofj " AMC For"' No . S (Rn 2' Jwl 47) lhit fo"" r oplocH AMC Fornt N.. 10~, which will Ito '""d u ntil tiO<I!t on honct oro ealfovtled. Jjj\fCLASSIFfFD 5D-OSI/STJ/ nam li:! Ferrt~ar:r 1951 SUFJECT: (Unclassifie<)) UNK~trmf SU~JSCT Eal J oon-shaped Object Reported a t Stockton }iJ.val up->ly Annex, Stockton, California, 1 J a lU;lrJ 1951 Co~r,;\nding General l d r tla ter iel C on.roand '\'frigh .... -Pat terson ,\ "r Force Ba~e Dayton, Ohio A'l'TN: ~tCEP 1. The f ollowing infor:nation is f 0n-u:trded a~ n '1atter of interes t to your Headquarters: A r eliable ~overn~ent agenc~ has furnisheo inf ormation to the effect that on 1 Jq~uary 1951, a r ed and ereen balloon-shaped object reportedly oescended upon the Stockton Haval Sup!JlY pot, St ockton, California. This object exploded U?On hit- ting the ground, but n part of it re~ain~1 t o eurn fiercely until extinguished by Uc-val security guard s . 'Ihe r e s l due "'as r~covered and ha s baAn t r anRrnitted to the FBI l abora t or y f or examination No information c~ncerning the origin of this o~j~ct is a vailable othPr t~an the recovery of a bambo rin~ from the debris, whi ch would ~mg~est the possibility of t r o:>ical or orie"1t a l C'Jnst ruc- tio'l. Additional -lnfo~tion will r e fflrw:.trdd'l upon r ecs1.p t . (P-2 ) 2. Attantio:1 in invi.ted to the fe1ct that i nf or-,.qt.ion Ct')'ltai.:led rein has been derived frr:" nources other t han US1' F. I n a c cordance vdth Parav-aph Sb, AFR 2'05-1, dios?rnination of the jnfornati on co"'ltained lterei.n must not be made outslde of U3AF chan'leJs . Colonel, USJ\F District Co~nrand~r HEADQUARTERS AIR MATERIEL COMMAND IN REPLY ADDitiSI lOTH COMMUNICATION AND EN- VELOP! TO COMMANDING GIHIRA&,. A I R MATERIIL COMMANO, AnEHJION FOL- LOWIHO O .. ICI SYMIOL: WRIGHT-PAnERSON AIR FORCE BASi DAYTON, OHIO J.!CIAXA-13 I~IAXA-la/ JJR/ eps SUBJFC.l': Unidentified Flying Objects (Project 10073) 2 G r:r~ m: Director ot Intelligence AT.m: Evaluation Division Technical Capabilities Branch Headquarters US.~ Washington 25, D. c. 1. Your attention is invited to the inclosed copy of letter dtl.ted 12 Februaey 1951, received from 5D-OSI, this ccJlD&Dd, pertaining to the BUbJect. This c.1.tter has been investigated b~sed upon the infonn.ation presented. It 'WaS found that typical high altitude balloons o!"tcn in- corporate an explosive cap tor the purpose of disconnecting the m~cban- 1cal cquiPDent used vith the balloons at a predetermined altitud~. M8Jfunct1oning ot the electrical circuit ~ explain the explosio~ ex- plained in the inclosed letter. 2. ~e personnel connected vith high altitude and veather research at this have no knovlettse ot ~ bamboo rings on th~ various types ot balloons now in use. 3. It is requested that action be taken to obtain additional tails on this incident e.nd this col'IID&Dd be advioed accordingly. FOR THIS COlttfANDDJG GENERAL: 1 Incl: t/ 5D-OSI ltr Hq AMC Form No. t (R Y I Fob 49) (Uncl3ssitiod) U?HClO,r.J SJD.JSC'l'J Balloon-~hapod Ohject Reoort.ed ~t S~ockt.:>n navd SupplJ A.r.nex, Stockton., Califomi3, 1 J~nue.ry 1951 -S.\!JO'r.\GE _ Dlroctor~te or I.ntell icence, Colloc~ion D:tv. 21 j, A~ ' ! Documents and Di3samination tr~ch Conntar Intelligence Divioion, Director3te of pecial I nvesticiafiiona, Ti1e Inspector General Lt Col D~xrn~rd/l:v'5362J Ref'orence is .r..ade t.~ R".cR dated 8 Fcbru:.ay 1951 in t;1e uoow cnot,iol1.~d r.:atter. 2. The l'f>I hn.s c.dviaed that a laboratory e.."'..am.ination of the evhlence s ubti.i.tit.ed flects that the "balloon-shaped" object Has probably cl homemnde "hot air" bnll~O'l. 1!o i'in.Jerprints of v:1l ue for c omp arison purposes 't;ers fotmd on the bazn.boo ring am not(l~Tt_g or p.:trt.icul\lr signif'icanca 11a s noted trith ~spect to t 1e \:ire s and oth~ IL~teri:U.:J or construction \';hich :nuld suggast. n possibl3 source for the&e A:\:l~eri~1 3. 3. Tha Ail' ll~tericl Co:"!ntand Jws been informed of this I.'!a t ter. Act3 Chiof, Countar Intel Div. Dir. or Special Jn .. restigrltions 'lha Jnspector C.:.neral tJNCG\55\E\E.D. Basic ltr fr AJJC to DI/Usi~F. dtd 26 Fob 51, ~ubjecl;a ( Postrictod) "Unidentii'iod Flying Objoots (Project 10073 )" AFOIN-V/TC l s t Ind Dept of the Air Force, Hq US.AF, \7ashington 25. D.C TO: Conunanding Gener nl, Force Duse, Dayton Air Materiel Ohio, ATTHa Cor.lllland, Hrif}l t-Putte rr;o n Air Chiof, Int;elli once Department 'l'ochnical. Capabili tios Branch was informed by Office of Special Investie;ution that the rosidue froo the bur rd.ng b alloon ho.a been examined by the Federal Buroau of Investigation. A laboratory anal- ysis of this reaidue will be made. Conclu:Jiona of the F'oderal Bureau of Investigation will bo fonrarded to your ooi!lr!lOlld l'lhen o.vallo.blo. BY OOMMAUD OF THE CHIEF OF STAFFa iUI,iC0\SS! : i ED. f!CLASSIFIED Air J ai:.crlcl C~ . tel 1 . l~cfor.Jnc~ is j a ... i.J 3U> oct a., La cr o" :!.nl:.cr ..;st to :,'ovr hJa.l~:~.u.!Lo..r:;: ;. avnl ~up_.l: J.Jt)~)ot, ~toc!,i,J.t, G ~i.Lorni.:'.. .ud.s v..., cl. 'l.>alloo. ' \'F,.w ,:!. i_rl oolloon.