DP. afi UTS LEK ib CSeerOn aoee. script as forwarded to you contained the appropriate information . to be disclosed and we requested that the Commission join the determination as to transmissibility if such was made or conidered. & The time interval between my receipt of Dr. Libby's letter Qul and the scheduled departure of foreign observers to the Pacific 2s Proving Ground left me no choice but to forward the briefing material, as approved by the Commission to the Chief of Naval TY ns wh EVIEW-DATE: DEPARTMENT C= 4 ‘ Department of Defense in a determination that the information TNS | was transmissible. Dr. Libby's letter did not reply to our QWs Ai; reduest and we are, as a result, unaware of the Commission's £ x ~~ Operations for use by Dr. Ogle. Nevertheless, I feel compelled to pass on to you my concern that the limited information which will now be given the British and Canadian observers is not in accord with the spirit of cooperation invisioned in inviting 8 x8 them to the operation and may reflect on the possible United States attendance at British test shots. . QE Sincerely yours, 2X /s/ Herbert B. Loper Honorable Lewis L. Strauss Chairman Chairman, U.S. Atomic Energy Commission Secretariat Note: *Copy on file in the Office of the Secretary **Circulated as Appendix "A" to AEC 787/34 This material contains information affecting the national defense of the United States within the meaning of the espionage laws, Title 18, U.S.C., Sec. 793 and 794, the transmission or revelation fo of which in any manner to an unauthorized person * is prohibited by law, Peete neposrrony NARH — College | cottection Re 326, 91-5F BOX No. 183 yer t 0) (NN3 - 326-493-01 rotpen MR&A_7 Redwing Vel. IE pie La r =e . " iii