; Pred ANTESYWGUIB aTrD Te TOP SEC br nestoralnty 3 I grypee tae te i met Radiation hazard: of these | over-water shots appears sufficiently low to permit firing at the close time intervais anticipated. The instrumentation mounted on the islands could, if not damaged, service three shots probably as well as two, 13, The CASTLE program recommended in this paper is believed to be the maximum practicable program, % covers all available possibilities for providing an emergency capability and should furnish an excellent basis for the future development of thermonuclear weapons.’ CONCLUSIONS 15, Any alternative plan such as postponing a portion of: the shots until the Pall of 1954 would be wasteful, costly, and harmful te either the immediate "emergency capability” program or future progress in the field of thermonuclear weapons, nf 16, The magnitude and complexity of a seven shot program is not to be underestimated, but must be reconed with in view of the importance of thermonuclear weapon progress, It there- fore appears ill-advised to consider anything short of a maximum effort for the CASTLE program, - 8 - . Enclosure "A"

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