Lyndon Johnson actually said...

We are the strongest nation in all the history of mankind.

Once our promise is broken in one place, even though it is a little country called South Viet-Nam, America's promise is worthless in all pla...

We will do, though, what must be done and we will do only what must be done.

This is the firm and the irrevocable commitment of our people and our Nation, whatever the risk and whatever the cost.