This may be over-simplified, but it seems to have worked so far. A. Norton, Livermore, California Our nuclear arsenal has to be retained and maintained at least as long as Russia does so. Actually, additional countries appear to have nuclear explosives. The other is friendly cooperation between all highly developed countries. Both these developments are difficult, will take a lot of time, but should be strongly pursued.
Nuclear deterrence is most important.
A particular important and difficult step is the development of missile defense. G. Parker, Fremont, California I don't know how it will work without a hitch, but I am absolutely certain that to have it with all of its disadvantages is better than not to have it. Please explain how our ability to destroy an incoming missile might decrease our security. W. Hutcheson, Livermore, California One type of energy release by the reactions of very light nuclei occurs more easily at high temperatures and high densities. Actual nuclear explosions under these conditions have been performed, but modern arguments of excluding further tests have stopped continued research.