sedhcb html hTp hichake Eye a. A thorough briefing of the U.N. observers prior to their arrival in the EPG. This probably would be conducted at UCRL, Berkeley, California, and will require about one week. b. The observers should be in the EPG approximately one week prior to firing the "clean" shot to permit their inspection of the techniques to be used in the demonstration. c. Measurement of total yield would be accomplished by fireball photography. d, Observers should be permitted to inspect and to ride in stripped-down B-36 aircraft used to collect cloud samples, e, Fission yield would be determined by radiochemistry at UCRL, Berkeley, in the presence of the observers and ‘possibly with their assistance. A decision has not yet been made as to whether or not samples will be given to the observers, The conduct of such a demonstration will require that the Joint Task Force remain active in the EPG for at least an additional three weeks. It is estimated that this will involve the expenditure of a minimum of an additional 1 1/2 million ‘dollars out-of-pocket by the DoD. The additional time and money required could exceed these amounts in the event of weather delays. The additional costs for AEC laboratory participation in this demonstration are estimated at approximately $500,000 to $1,000,000. These. costs do not include the cost of the weapon or of the normal operating expenses of the military units involved. If the U.N. observers are to be present, it is believed thas an international group of news media representatives should siso attend this demonstration. The total number of observers should be limited to approximately 45 to permit their accommodation without undue difficulty, It is estimated that about 15 scientific observers, selected by the U.N., should attend to insure that they obtain a complete coverage of the technical phases of the demonstration, This would permit the attendance of approximately 20 vepresentatives of U.S, news media and 10 representacives from the media of other nations, It is considered appropriate that the AEC, in conjunction with the DoD, select the U.S. press representatives, and that the State Department arrange for the selection of news media representatives from other nations. The AEC recommends that the OCB consider the impact on public opinion of foregoing or carrying out a program substan tially as outlined above and recommend as bo whether such program should be uncertaken. The AEC recommends further that the OCB note that, if undertaken agencies should proceed immediately with further action as follows: ~ Do

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