Lyndon Johnson actually said...

Those who negotiated at Geneva drove a hard bargain, but we believe it was a fair bargain.

If we can do it in these four or five, we have a land of opportunity out there where we can do it in others.

To retreat from it would, I think, set a chain reaction of counter-protection and retaliation that would put in jeopardy our ability to work...

The problem of all the world is a problem of what are we going to do about the developing nations.