Lyndon Johnson actually said...

Make no mistake about it: The American people that you represent are proud of you.

I give you my pledge: We shall never let you down, nor your fighting comrades, nor the 15 million people of South Vietnam, nor the hundreds ...

So man's greatest problem is the fearful race between food and population.

One day when they know peace, the whole world will acknowledge that what you have done here was worth the price.