_ Dahee ge SL PERSONAL than were tested in 1984. The Atomic Energy Commis- sion at any rate has informed me that it has no such plans. If there is ever to be a test of larger weapons, this would have to be submitted to me, evaluated, and cleared by ms, Chairman Strauss is opposed to any larger shot than we have had. Someform of limitation either in numbers, explosive yield, fission product output, or even a temporary test suspension might well be the reault of the current disarmament negotiations in London. To announce the concession unilaterally would deprive our negotiators of whatever trading advantage it might embody and that could be substantial. You have recommendedregistra- tlon with the United Nations in advance of tests and, in effect, we do this because we announce our tests in advance to the whole world. it was with this end in view, viz., to re-emphasize this fact that in the Bermuda Declaration in March we stated that we would register our intention to conduct teste with the United Nations in advance. I do want to assure you that my position ls far from being inflexible -- has indeed been a constant effort to find a way out of what has for so many years seemed an impasse. Meanwhile, our tests continue to develop very valuable information, not so much in the enhancement of the destructive power of atomic weapons as in civil effects tests to improve our protective measures in event of attack -- in the development of warheads for missiles to be employed in defense against an airborne attack -- and in the further development of the feature of cleanliness which, as of now PERSONAL 1 { 1 , 4

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