Since nearly 2 years of work were required to formulate the UN plan, can this plan be regarded as adequate for hydrogen weapons so long as the control measures for the atomic energy industry are not explicitly elaborated with the same detail as the arrangements evolved for controlling U-235 and plutonium? It may also be pointed out that the existing UN plan contains no provision for physically protecting informants who advise the international agency of violations. Might potential informants keep silent for fear of being punished by their national governments? Is this factor important if the existing UN plan were subjected to the added strain of controlling hydrogen weapons as well as atomic weapons? What safeguards would assure that the employees of an international control agency would be faithful and loyal to the objectives of the agency and that they would not work purely in the interests of some national government—perhaps a national government other than that of their own country? AUTHOR’S COMMENT The language makes it obvious that the United Nations plan “foresees and carefully takes into account the possibility of an H-bomb.” In view of Russia’s attitude, however, and to leave no room for future quibbling, the present plan should be explicitly elaborated to include hydrogen weapons. On the other hand, since Russia will have none of the plan, such elaboration would at best be purely academic. As for protecting informants, certainly no plan could contemplate that citizens would act as spies against their own country, even if they find that their country is violating an international agreement. The plan is designed so that such violations could be detected by the official employees of the international control agency. Obviously, such official employees stationed in any country should not be nationals of that country and should be protected by diplomatic immunity. Each country, in selecting its representatives to the control agency, would naturally subject them to a most careful screening as to their character and loyalty, and would use all necessary checks to make certain that they are faithful and loyal to the objectives of the agency. 4. IS CONTROL OVER FISSIONABLE MATERIALS SUFFICIENT TO PREVENT THE PRODUCTION OF HYDROGEN BOMBS? IF SO, IS THE EXISTING UN PLAN ADEQUATE TO THIS TASK? The technical facts suggest that H-bombs may be regulated in at least two ways: (1) Control over the fissionable material usable as a “trigger” and (2) control over deuterium and tritium. Perhaps control over _all_ fissionable material would give effective control over hydrogen weapons. However, by way of specific example, the introduction to volume VI of the Scientific Information Transmitted to the United Nations Atomic Energy Commission, June 14, 1946-October 14, 1946 (see State Department Publication 2661, pp. 151–152), comments as follows: