Sorensen:
Uh... it was American policy in the Kennedy administration,
before and since, that America was prepared to use uh... nuclear weapons to
prevent the conquest of western Europe. No one uh... believed it would come
to that, but the only way that a superpower with nuclear weapons and
overwhelming conventional strength could be deterred and the only way that
our allies could be assured and thereby prevented from going off in six
different directions on their own was they promised that we would be willing
to stand up and risk our security for their security.