Dwight Eisenhower actually said...
My friends, through such measures as these, and through knowledge we are sure to gain from this new plant we begin today, I am confident that the atom will not be devoted exclusively to the destruction of man, but will be his mighty servant and tireless benefactor.
Context
Radio and Television Remarks on the Occasion of the Ground-Breaking Ceremony for the Shippingport Atomic Power Plant
09/05/1954