appeared seriously to violate security. (Specifically, it-had been stated that tritium was no longer required for our thermonuclear weapons.) The GAC deplored this both as a terrible leak of security information and as very damaging to morale in the Commission's laboratories, andwished to. bring the matter to the Commission's attention, There was considerable discussion on this subject, Dr. Rabi informed the visitors that the next meeting of the GAC Dates. of Veoting would be on May 27, 28, and 29, and that it would hold a party for the Commissioners and their principal staff on the 28th, | At 11:40 a.m. the visitors left. Before adjournment, Dr. von Neumann asked if the Weapon Subcommittee could visit Los Alamos, Sandia, and Livermore. about the middle of July. This was agreed on, and Dr. von Neumann said he would arrange it in tandem with the trip of the Reactor Subcommittee, (Appendix C, item 4) At 11:45 a.m, this final session was adjourned, . Richard W. Dodson secretary Attachments: Appendix A -— Schedule Appendiees B and GC = Chairman's Report ya thet &

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