APPENDIX "c"' DRAFT LETTER TO THE CHAIRMAN, MLC 1. This is in answer to your letter of June 20, 1956, concerning the proposed briefing of United Kingdom and Canadian official observers by Dr, Ogle, Deputy Commander for Scientific Matters, JTF~7. 2. The Commission requests certain changes be made table of shots attached to the proposed talk. in the As presently written Dr, Ogle will be able to discuss only three shots (LACROSSE, CHEROKEE, plus the shot observed) from the table. Since these will give a very incomplete picture of Operation REDWING we suggest Dr. Ole we authorized to present the entire table but with the dates of the shots deleted and the "Approximate Expected Yield" replaced by the following: "Low KT" (less than 100 KT) "High KT! (100-999 KT) "Megaton” (1 MT or greater) If all shots are listed, giving the dates of the shots may permit accurate correlation of the shots with British debris samples and long range detection measurements, Also, if approximate yields of all shots are furnished, by averaging these a fairly accurate estimate of the total yield could be obtained. Since it may later be desirable to furnish the British the total fission yield of the REDWING series in connection with intelligence cooperation we believe it undesirable to give even approximate yields of all shots. 3. With the changes noted above the Commission concurs in the use of the proposed talk for briefing the foreign observers ~ 16 - Sneath Appendix "c"

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