We did not know at that time that there were only two bombs in our supply, and it would take quite a while to construct more. We also didn’t realize the struggle that was on going in Tokyo between the army and a selected group of civilians to continue the war. The army wanted to fight for every inch of ground and not give up. The civilian leadership wanted to persuade the Emperor to capitulate and not continue the fire-bombing and dropping of other atomic devices.
There were almost no Americans who realized the destructive power that atomic energy contained. Very few facts were immediately available concerning the bomb, and its characteristics were little known. Everyone knew what had happened to the two major cities in Japan, but no one really understood how or why it had been so devastating.