for calendar year 58, in which he requested an additional test in the atmosphere. Along these lines, ''Mr. Strauss reiterated his concern about the large number of weapons scheduled for testing during operation Hardtack and recalled that the President had asked that the Commission eliminate some of the shots originally scheduled. If the contingency shot is added, he said, the total number scheduled will be up to again. This, he remarked, seemed to be a reflection of the DCD's requirement for an increasing number of different nuclear weapons types. The Commissioners discussed the shots scheduled for 58 and Mr. Libby requested that the letter to the President concerning operation Hardtack state the amount of off-site fallout which will result from the series.'' (including The Commission theniapproved the revised Hardtack program tests), approved and also approved the conduct of during 58. underground tests at Nevada(MILLRACE) l-point safety tests at the NTS This then would go into the appropriate letters for execution authority to the President, etc. Meeting #1327, 28 January 58: Among the discussion at this meeting, Libby discussed the question of avoiding detectinn of a nuclear test by placing the weapon in an earthquake fault , either underground or submerged, and then having detonation in seguence. His inquiries of certain California seismologists had indicated that detection under conditions would vary with the medium and it was: felt that it wduld be difficult to detect such tests in the Pacific but not in Nevada. 59

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