12, Consideration was given to limiting the CASTLE progres to a maximum of four shots and deferring the remaining tests to a Later operation. While this wuld be favorable from the point of view of simplifying and shortening the CASTLE Operation, 1b would not be consistent with the maxinum effort toward thermonuclear progress, It would also involve preater expense inherent in tuo scparate operations. | ¢ eensea a ree ree | Radiation hagand of these over-water shots appears gufficiontly low to permit firing at the close tine intervals anticipated. The instrumentation mounted on the islands could, if not damaged, service threa shots probably as well ag two, 13. The CASTLE program recommended in this paper is believed to be the maximum practicable program. It covers all available pessibllities for providing an emergency capability and should furnish an excellent basis for the future develorment of thermnuclear wea pons.