IIT the sampling unit was flight testing the aircraft and turned up a multitude of minor discrepancies but these were hunted down and corrected, The prototype sampler cost $22,760 to modify while each of the other 15 aircraft cost $19,260.° Concurrently, the control aircraft were modified and sent to Wright Air Development Center for flight testing and from there to Walker Air Force Base, New Mexico, early in August 1962," Training For Sampler Pilots On 2 March 1952, Dr; Plank visited the Special Weapons Command when plans were drawn up for training the F-8LG pilots to sample atomic clouds, Also, a letter from Los Alamos Scientific Laboratory formally requested that the Task Group 132, sampler pilots be allowed to participate in TUMBLER/SNAPPER and the Center approved the program on 26 March 19528 During one of his visits, Dr, Plank explained the reasons and theories behind cloud sampling, The Strategic Air Command pilots picked to fly the F-8)G sampler aircraft were pleased to learn that they were doing something useful, ", . . not Serving as guinea-pigs as they seriously believed when first called upon to do the sampling."” In late March and early April 1952, the F-8l,G pilots passed through Kirtland fora short period of training in theory of radiation and in the use of radiac instruments. Afterwards, in groups of five, they took additional training at Indian Springs Air Force Base where, as noted previously, they penetrated atomic clouds during the TUMBLER/SNAPPER detonations, To avoid excessive radiation which might inhibit sampling 66 SWEH-2-003h, / AFWL{HO go Un