Phe would require resolution. With concurrence of DOD and AEC, the Special Weapons Develop- ment Board was designated late in 1950 as the agency to determine division of arming and fuzing responsibilities. The Board did allocate and set up some Ad Hoc Working Groups. Subsequently, it was agreed that after the first four atomic warhead installations, the Military would assume the arming and fuzing responsibilities. As a consequence, the Ad Hoc Working Groups are now in the process of reconstitution into Joint Project Groups reporting to: the CG, FC, AFSWP; President, Sandia Corporation; and the designated DOD agencyas principals. Because of the large number of missiles designated to carry atomic warhead installations, it was evident that a high degree of standardization would be required. Considerable progress has been made in the direction of interchangeable warheads, not only between several missiles but also between a warhead and the associated free-fall bomb. This has resulted in the so-called "Maximum Bomb Availability Plan" whereby all warheads are to be stockpiled with their fuzes in bomb configurations until the bomb requirements aresatisfied. Bomb-to-warhead conversion components and complements (analogous to fuzes) will also be stockpiled to provide the conversion capability to missile warhead installations when desired. Lately, considerable development effort has been devoted toward simplification of the bombto-warhead conversion process. Employment of standardized weapon components (i.e., baroswitches, radars, etc.), test equipment, and handling equipment has resulted in signi- ficant savings in both bomb and missile warhead installation programs, Thermonuclear Weapons Development Since an intensified research and development program was directed in January 1950, primary responsibility has rested with Los AlamosScientific Laboratory. During development an organizational framework was developed which included American Car &Foundry Company, and extensive cryogenics assistance from National Bureau of Standards, Cambridge Corporation, and Herrick Johnston. It may be assumed that the developmental organization will point the way for the production organization, Future production will require the resources of the nuclear, high explosive, and inert production system. Added to this will probably be the ACF, Cambridge, and NBS facilities to meet unique requirements. The Organizations Developed for Nuclear Field Tests Los Alamos Scientific Laboratory originally carried almost all of the SFO responsibility for nuclear field tests. LASL still carries very heavy responsibilities but by mid-1953 the technical responsibility was being shared by Sandia Laboratory and to some extent by Livermore, and a considerable measure of administrative responsibility had been transferred to SFOO, and, in certain respects, to military participants. Overseas Tests All overseas tests, beginning with Bikini in 1946, have been conducted by a joint task force commanded by a military officer and with responsibility for the scientific and technical phases and, beginning in 1948, many maintenance, construction and other support phases, resting with SFOO and its key contractors, Executive agent responsibility has been rotated between the military departments with the Chief of Staff, U.S. Army, being agent for Sandstone; the Chief of Staff, U.S. Air Force, agent for Greenhouse; and the Chief of Staff, U.S. Army, agent for Ivy and Castle. During the period between operations, the JTF Commander's responsibility haSbeen limitéd to planning and coordination of preparations for the operation, and to providing military support in the form of transportation, communication, etc. DOEJALO