Truman didn't. Albert Einstein did, and after seeing the horrors it caused, stated he wished he had never made the atomic bomb.
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Neither did, it was made by the Manhattan Project which involved tens of thousands of scientists, technicians, and ordinary workers many of which had no idea what was being made. FDR authorized the project, at the request of Leo Szilard on a letter signed by Einstein (which was the only connection Einstein had to it, he was a pacifist and never worked on anything war related).
he didnt
How did truman react to ussrs deployment of an atomic bomb
Truman dropping an atomic bomb on Japan
Truman dropping an atomic bomb on Japan
Harry Truman drop the Atomic Bomb on Hiroshima, Japan and Nagasaki, Japan.
princess patrick harwood President Truman
Truman
Harry Truman
He did.
Truman
The atomic bomb test
Harry s. truman approved the dropping of an atomic bomb on japan.