Naga --Collese Paetk REPOSITORY 408481 ; (951-195 3, é aa RL 326, he f the Serefary COLLECTION - rotpen MREA tus d * As Re pe <10) BOX No 208 wn 3-324-43- Ae Bab & Uy. -7, Had tack Vol.3 , May 26, 1958 Cc. L. Marshall, Director Division of Classification W. B. McCool, Secretary COMMISSION DECISION ON ABC 952/51 - DECLASSIFICATION OF INFORMATION RELATING TO SHOT PINION OF OPERATION HARDITACK Symbol: 1. SECY: JEA This will confirm our telaphone notification of May 22, 1958, that at | | | Meeting 1376 on May 21, the Commission: that the declassification of the total yield, the tine "and ication, and the scheduled date of shot PINION of Operation RARBTACK. and the fact that at some unspecified previous test a Zive megaton total yield device was detonated would not result in serious damage to the nation or be prejudicial to the defense interest of the nation; b. Determined that the total fission yield of that event and any information that may be derived from samples of the radioactive cloud and the fact that the device being tested is a stockpile nuclear weapon may be published without undue risk to the common defense and security; c. Approved that declassification of the information set forth d. Moted that the declassification actions recommended will not in items a through £ of paragraph 2 of ARC 952/51; be effective until the comments and concurrence of the DOD are received, ie (17/5 } [| = 2 2 x 2h Uy pe aMee? ZEQEE | eeNes 5 These will be sought by letter such as that attached as Appendix "A" of AEC 952/51; and 55225 e. Noted that JCAE and GAC will be notified of this action by letter such as Appendix "B" of ARC 952/51. 2. The General Menager has directed that you take the necessary action to implement this decision. Copies of ay pertinent correspondence. should be provided the Office of the Secretary. \ 1 prin pe (Continued) BEST COPY AVAIL mat Ra ae “ ‘ i} aR: This material con‘aing information affecting the national defense ef che Woaied Grates within the ey Oda 13, U.S.C. .¢ meanerfot, Sees. 795 ara ae ee tn aon or revelation of which ju any masacr to an unautnevrived person is prohibited by law.