CEPDET bal ra 4h n FA ca tSF eoLENSAL 4, The laboratories! HARDTACK program represents an 80 percent increase (on a shot basis} over the 17-shot REDWING — program. | “the:actual ‘devices to be fired, their total yields, fission yields, and positions of firing are not firmly established; nevertheless, it would appear that Operation HARDTACK may and probably will produce more world-wide fallout than did Operation REDWING, a. It was felt that every effort should be made to keep the number of shots and the total fission products to a minimum. Consequently, the laboratories were asked to screen carefully their proposals to insure that the number of shots and the yields were clearly necessary in the interest of furthering the weapons program. They were specifically requested to consider _ reduced yield versions of their large-yield shots, which would still be capable of providing the necessary important data, and to consider the impact on their ability to conduct an effective and adequate test program if they were limited to 20 shots, to each laboratory. 10 The number 20 was chosen as representative of the order of magnitude of REDWING. 6. Dr. Bradbury, in his reply, pointed out that approximately 10 of the le shots proposed by LASL are required for their - 9 - Appendix "a" eeepmre crt potest yt ace