“) - =28— in which interchangeability of cores in bombs was a déminant feature, He expressed concern that this thinking -- "we don't know what we want to do butwant to be able to do anything" -- is no longer relevant or appropriate, Since 1954, the to--stage classes A, B, C, and D which have been ° set up cover the spectrun of yields and of vehicles in the thermonuclear field. In a number of cases they appear to render particular standard fission bombs obsolete. the MK-6 and MK-13, with weights corresponding to Glass C, are "dead ducksil; Ts anyone going to care about using a B-4,7 to deliver kilotors when 3 MT bombs of the same weight are avail- able? -Is the MK-5 yorth cabrying -- who prefers it to a class D weapoa? The A to D dlasses appear to cover the strategic area. Dr. Bradbury spoke for abandoning the array ccncept. He suggested, instead, additional classes to cover the tactical aren. "Class E" —- For fighter bombers, missile warheads, etc, ‘This might be the size of MK-7» 30", weight 1600 1b and yield wat yan ye Is this the proper size and yield to fix on for the particular purpose? The real point is to fix on a device with characteristics that people want, and then to make that weapon the best we can. . DOE ARGETVEg aes Le "Class F" — 30" (MK-7), 1600 lby pe” "Class G!' — There might be two subclasses, G' and G!! in the 15-22" range, for air-to-air defense, anti-submarine use, missile warheads, — , Beane ” aecRaghaaies