We have now reached the conclusion that it will be possible to make an effective uranium bomb which, containing some 25 lb of active material, would be equivalent as regards destructive effect to 1,800 tons of T.N.T. and would also release large quantities of radioactive substance, which would make places near to where the bomb exploded dangerous to human life for a long period.
But there was one thing about which there was never any doubt. The courage, the unconquerable grit and stamina of our people, showed itself from the very outset. Without that all would have failed. Upon that rock, all stood unshakable.