z i aecigpeensESEAEPgOS SG ES epgTST eeAEEADUteAEN Prefect coer ttcw ec a e -. * yagrmpohemmenpet . “eae rem re MotenANSaoeas ca re Dr. Mark said that | Los Alamos Séientific. Laboratorywas not| doing any flat plate experinents, Dr, Fine told the Committee that Livermore was doing such work at Inyokern and at Los ‘Alamos. At 4:15 p.m. the session was adjourned for 15 minutes, during which period the Committee left to see 4 film on CASTLE. | | At 4:30 p.m, the Committee returned to meet with Dr. 5. G, English, Detec‘tion ‘of USSR Tests Dr. English advised the Committee that it was the statement of AFOAT-1 that tests within the USSR-controlled territory of 50° KT or larger could be detected with 100% certainty if the explosion were an air, surface, or shallow subsurface shot. He said that they can detect a 10 KT or larger shot with 90% certainty if it were exploded in air, on the surface, or in the shallow subsurface. They also state that they could detect a contained 50 KT shot with 75% certainty. : At 4:45 p.m, this Fourth Session was adjourned... FIFTH SESSION (May 29, 1954) _ The Saturday session of the Meeting was called to order by the Chairman at 9:30 a,m. All Committee members (except Dr. Libby), the Acting Secretary, and Mr. Tomei were present. After some discussion, during which Dr. Wigner and Dr. Buckley Dates, Next Meeting stated that they probably could not attend, the Committee voted to have the List Meeting of the GAC ‘at Sandia and Los Alamos, New Mexico, on

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