These peasons are enumerated below: inadvisable. m The UPSHOT program is now ex- i “sending well into May 1953 and may be subject to still The Los Alamos Scientific Laboratory further delays. ; . believes that several months are required for the os tao. results UPSHOT evaluation and proper application of CASTLE designs, and that an earlier date for CASTLE Will make it unlikely that there will be full use of the This could have the effect of either earlier results. SO jeopardizing the subsequent program or-of making it impossible to employ the otherwise possible technical achievements. 3. . _ From the practical standpoint of test operations the time between UPSHOT and CASTLE as earlier proposed is too short and is becoming even more so with UPSHOT delays and postponements. Furthermore, the length of the CASTLE test operation proposed (particularly when supplemented by the Livermore proposals) makes it -essential that a season at Eniwetok be picked when the weather is as good as possible and, when the inevitable shot day postponements occur, the consequent delay in the program does not lead to times of still worse weather but rather to better weather. Finally, we ‘ believe it impractical, if not impossible, to require civilian test personnel and task force personnel to be overseas during the latter part of December. Witenes Oe C Thdeed,“itvis'a serious @oncernofthe~Los’AladinosScientific Laboratory that appropriate military logistic support for a system of this nature can be ready in time to provide this feature of real capability for emergency use in the event of war. -3- Enclosure "A"

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