This document consists of . Copy Nowe? of 3q. a 1 pages ~Sertes oC . 409046 UNITED STATES ATOMIC ENERGY COMMISSION WASHINGTON 25, D.C. July 18, 1956 OTPARLIVILNT OF ENERGY, DECLASSIFICATION REN { Honorable Herbert B. Loper Pisteeeeee ieTSAINE Chairman, Military Liaison Committee’” | a, aC ‘ Aa IGE to the Atomic Energy Commission =... vi AAS GO ~ PO WANng Dear General Loper; Reference is made to your letter of 12 July 1956* con- cerning changes recommended by the Commission in the manu- script of a talk to be given by Dr. Ogle to the British and Canadian observers. I understand that General Starbird con- tacted you immediately upon receipt of your letter explaining that the only change the recommendation would make in the MLC proposal would be for the two past shots (CHEROKEE and LACROSSE) and for the shot or shots observers would see (PEWA and/or HURON). The effect of the Commission proposal was, of course, to permit the full chart proposed by Dr. Ogle to be used by eliminating the firing date and substituting for the bracketed yield the terms “low KT, high KT or mega- ton," General Starbird explained that this was done in the interest of preparing a more useful talk and that the action was coordinated with the MLC staff though there may not have been a full meeting of the minds. It is my understanding, too, that it was agreed that, if the Commission could permit giving a bracket estimate of yield for the shots to be observed, the difficulty mentioned in your letter of 12 July would be obviated. It was understood that this estimate would be that applying prior to shot time and would not be refined after shot to reflect more accurately the yield. Based on tnis information the Commissioners were informed of the problem and agreed that informing the British and Canadians as desired with respect to the shots they would see would not involve the giving of important information with respect to nuclear design. This letter will confirm the statements given you earlier that the Commission concurs in informing the British and Canadian observers in REDWING with respect to the shots they will see (TEWA and/or HURON) that the estimate of yield expected: for HURON is between 100 to 500 KT; and for TEWA is between 5 to 10 tegatons. Sincerely yours BEST COPY AVAILABLE General Manager *Secretariat Note: Circulated as AEC 787/36, . RESTRICTED DATA icted datggas Act of peWson is pifohibited. 4, losure offits an unauthg@ized

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