Harry Truman actually said...

I shall always treasure it, and I hope that I can live up to the sentiments expressed in the sentence which is on the plaque.

I would be perfectly willing to do it, but then I think if you consult the doctors in charge of this thing, they want young blood.

I am highly appreciative, and thank you very much.

I think you will find that the blood of a 68-year-old man is not fit for the boys.