The dangers in the proliferation of national nuclear weapons systems are so obvious that I am sure I need not repeat them here. It is because of our … - John F. Kennedy

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The dangers in the proliferation of national nuclear weapons systems are so obvious that I am sure I need not repeat them here.
It is because of our preoccupation with this problem that my Government has sought to arrange with you for periodic visits to Dimona. When we spoke together in May 1961 you said that we might make whatever use we wished of the information resulting from the first visit of American scientists to Dimona and that you would agree to further visits by neutrals as well. I had assumed from Mrs. Meir's comment that there would be no problem between us on this.
We are concerned with the disturbing effects on world stability which would accompany the development of a nuclear weapons capability by Israel. I cannot imagine that the Arabs would refrain from turning to the Soviet Union for assistance if Israel were to develop a nuclear weapons capability--with all the consequences this would hold. But the problem is much larger than its impact on the Middle East. Development of a nuclear weapons capability by Israel would almost certainly lead other larger countries, that have so far refrained from such development, to feel that they must follow suit.
I can well appreciate your concern for developments in the UAR. But I see no present or imminent nuclear threat to Israel from there. I am assured that our intelligence on this question is good and that the Egyptians do not presently have any installation comparable to Dimona, nor any facilities potentially capable of nuclear weapons production. But, of course, if you have information that would support a contrary conclusion, I should like to receive it from you through Ambassador Barbour. We have the capacity to check it.