“RG IC ENN ERGY ATOM 326 WSCOM MISSIO Laws : Box__ ap tay 27 wi pie - Folder ' a SECRETARIAT os | Collcetion . —| men . Honorable . sterling Cole Creircan Joint Com-ittee on Atocic Energy Congress of the United States Sam oe wcmarendt Lear Fr, Coles . ai. ey Very recently, in the course of Ccevelopment of thermonucleer Cevices to be tested at Operation CASTL!’, it hes become ap- ew Perent that the precision requirexents on yield for the ) ~ ei oo . Gre such as to require confirsstion by full scale test of © that conpencenat. The urgency ef this requirenent ves not snticipated at the tire the UPSHCT prorren of full ecale tests &t the hevaca ireving Grounds was sct. £ full scale nuclear test for the elcove purpose has tren ese proved and will te held at the Ncveca Troving Crouncs at the cerlicst practiczble dete. when the turret date i: established, ve “LI1 advices you thereef, anc at the a:prepriate tine vill relcése an ennouncenent to the press in crcer to irforn the pullic cf this test. bd.8 coread we anticipate the eetual cetonatian will take plece sae tine mex’ vetck = perhap. as early as dune 1. rovevery, the ectual Cate till have to be paumd by the rrorress of preparations Loe Uncereéye In vicw of this, no cificial cbserver er urcor aa (2 pi fivcawatien cropré.és ere plenned dor Usb shote pancerely yours, Gordon lean . Chsiruan *nelosures Draft Press Release 3 . CLASSIFICATION CANCELLED WITH DELETIONS BY AUTHORITY OF DOE/OC we 12/5 FIEVIEW B Sl DATE acy 1/2118 - -h °