A The objectives of the security and public information programs for Operetion IVY and the mensures taken to achieve those objectives were revicwed in detail. papers of the AEC 483 Series) (See AEC 483/27 and previous The yquestionsof whether censoring or delaying the dispatch of mail of persons engaged in the operation or delaying their return to the mainland after the first shot would have been helpful were discussed. The present status of the sccurity and public reporting programs and of the psychological strategy plan were next considered,and the cxtent to which those programs had been affected by publication of lotters written by JTF-132 personne] and by other unauthorized statements. On the subject of vitiation of the psychological strategy plan, Mr. Salisbury caid that unquestionably considerable harm had been donc which it would be difficult, repair. if not impcssible, to It remained to determine what steps might be taken to prevent further damuge. On the subject of the timing and contents of the public announcement to be made after the second (KING) shot, My. Smyth suggested that the only advantage in delaying the énnouncement would be that such « procedure might reduce the probability of successful long-range detection. that if the announcement were held up, He pointed out the departure of personnel end observers from the test site would also hive to be delayed, and that it would be necessary to postpone both the departures and the announcement for 2 period of weeks in order to achieve what would probably prove to be a very small gain or none at all. Mr. Zuckert said he, too, belicved that the possibility of lessen- ing the chances of sucecssful detection by delaying the announccment scomed slight.