USA HISTORY

Detailed explanation-1: -In mid-July, President Harry S Truman was notified of the successful test of the atomic bomb, what he called “the most terrible bomb in the history of the world.” Thousands of hours of research and development as well as billions of dollars had contributed to its production. This was no theoretical research project.

Detailed explanation-2: -After Japanese leaders flatly rejected the Potsdam Declaration, President Truman authorized use of the atomic bomb anytime after August 3, 1945. On the clear morning of August 6, the first atomic bomb, nicknamed Little Boy, was dropped on the city of Hiroshima.

Detailed explanation-3: -The biography for President Truman and past presidents is courtesy of the White House Historical Association. During his few weeks as Vice President, Harry Truman scarcely saw President Franklin Roosevelt, and received no briefing on the development of the atomic bomb or the unfolding difficulties with Soviet Russia.

Detailed explanation-4: -In 1940–1944 he gained national prominence as chairman of the Truman Committee, which was aimed at reducing waste and inefficiency in wartime contracts. Truman was elected vice president in 1944 and assumed the presidency following the death of Roosevelt.