John Kennedy actually said...

If I were Mr. Khrushchev, however, and had spent some time in the West, I would take a somewhat different view of the tide of history.

I can assure you that the United States of America intends to bear its full part.

I have not been informed, and all my information is to the contrary, that there was any involvement by members of the CIA or any other membe...

I think the question suggests a basic problem which is not easy to solve.