In addition to these of Los Alamos and the Radiation Laboratory, five more shots, listed as Department of SS devices, were scheduleds readiness"date of tl)rey1958. This was to be a very high altitude test, at 92,000 feet, the device being borne by a free balloon, 9 yield, with a readiness date of 1 May 1958, An ultra high altitude test from a Redstone missile carrier, the device was to be detonated at 250,000 feet, att} 4 3e on yield, having a readiness date of 8 May 1958. “ Yne carrier of this weapon was unspecified, although the test was listed as a very high altitude test (100,000 feet). ed ~ wo eh ; se tage having a readiness date of 1 June 1958, This shot, named PERCOLATOR, was scheduled as 4 shallow water tast. De a readiness date of 22 June 1958, having Known as LITTIE “IGWAM, this was to be a deep water teat, Because of the lack of specific HARDTACK planning information, the 4950th Test Group (Nuclear) concentrated its effort during late 1956 and early 1957 on Operation PLUMBBOB, which entered its operational phase in May 1957, Nevertheless, several noteworthy HARDTACK planning activities were conducted by the 4950th during this period. Colonel William B, Kieffer, the future Commander Task Group 7.4, and Colonel Puul %. ‘iignall, Commander of the 4950th Test Group (‘hclear), iA AFWL/ HQ :

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