L The Livermore answer on 18 May lon Harold Brown began by addressing the high tenn rl A y on shielding altitude question and stating that Livemnore feels a convincing argument revealing of high altitude shots can probably be made to the Russians without substantial weapons design information. With respect to the undermround situation and ct answer with a short tern decoupling experiments, Brown feels that probably an incorre So. program (in a month or so) is of less value than a correct answer in a your or It would be extremely difficult to get anything meaningful in a month or two from new experiments. The problem with decoupling is not whether a large enoughwill produce decoupling but whether such a hole can be made, at what cost, and what the effects of inelasticity are. LRL, however, will look into the problem of a crash program as well as the possibility of Lined holes. In furbher messages, Livermogee’ discusses with DMA the various possible tests, such as very samll shots in salt blocks, and evaluates whether they are useful at all and which ones ought to be pursued for which reasons. This was the beginning of such things as PROJECT COWBOY.

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