A2 May TWX from Brown to Starboard answers the previous TWX's questions and lists in detail the time sequence and corresponding yields for various a <5 ‘y weapons development to reach such goals as a 6,000 LB., 50 Megaton development, a 2000 LB., 12 Megaton development, etc. After going through extensive discussions of which of the various developments sequences “could be done under the two scenariog therefore what level of weapons could “could be tested and undetected, Brown that Starboard had set forth and be developed provided these levels qtates while this is all completely speculative, it is however indicative of Same of the kinds of advances that could be made by tests carried out in the next four years (and past two years) clandestinely by the Soviets. Further Brown states "the list is princtpally concerned with large weapons because those are the kind which might require tests in the range [0 KT and above. The tactital weapons, which we consider would be capable of producing an equal or greater imbalance in nuclear capability, can all be done with tests in the kiloton range, of whose easy concealability there can be no question." All this seems to point to the fact that we are either trying like mad to identify just what we can do in the way of development and still hide it, or more fikely, the most speculative guess as just what the Soviets might have been doing and still be able to do under certain test ban agreements. l i report on "Proposed LASL/Sandia Vela Hote - 3.May 1960, LASL/Sandia d Fx dule notes shots sche Experiment for the Ranger A-| and A-2 Probes"; for April and June 1961. opece. Crunches

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