SWRW ro] 6 June 1957 OPERATION HARDTACK t Operation HARDTACK is scheduled to be held in the Pacific in the Spring of 1958, The following devices are tentatively planned for in- clusion in Operation HARDTACK by the AEC laboratories and the Department of Defense, It should be emphasized that this is very preliminary information and will probably change considerably before a final program is established, Al s Scient Labor WLLETED AFWL/ HQ ~ Inclosure 4, page2...