Neither he nor the builders knew what the "physical" after effects of the explosion might include.
However, Truman may have had several motivations for its use as a weapon. The first was obviously to coerce the surrender of Japan. But he also may have hoped to dissuade the Soviet Union from trying to exploit the war to gain territorial concessions. A successful atomic weapon might also extend US foreign power without the need for massive conventional military forces. And to some extent, it did.
Harry s. truman approved the dropping of an atomic bomb on japan.
Harry Truman is most famous for authorizing dropping the first atomic bomb on Japan.
President Harry S. Truman
The Atomic Bomb dropping and winning te election of 1948.
That was Harry S Truman
President Harry Truman
Harry Truman authorized the use of atomic bombs against Japan.
Harry Truman was the President that ordered the bombing of Japan.
President Harry Truman authorised and ordered the dropping of the two atomic bombs. He was following up the plans made under the Roosevelt administration. He didn't actually drop it himself, I doubt that he could have even picked it up.
President Harry S. Truman H.M. Porter mike1porter@netscape.netHarry S. Truman
Harry S. Truman.
He ordered the dropping of two atomic bombs.