As a military man who has given half a century of active service I say in all sincerity that the nuclear arms race has no military purpose. Wars cannot be fought with nuclear weapons. Their existence only adds to our perils because of the illusions they have generated. There are powerful voices around the world who still give credence to the old Roman precept - if you desire peace, prepare for war. This is absolute nuclear nonsense.
Every President I think I've ever known, except Truman, has thought they didn't quite get done what they wanted done. And toward the end of their Administrations, they were disappointed and wished they had done some things differently.