Was Harry Truman justified in deciding to use the atomis bomb?

the development of teh atmoic bomb began in 1939 when a small group of scientists in this country called to the attention of the U.S.Government the vast potentialities of atmoic energy for military purposes and warned that the Germans were already carrying on exeriments in this field. The program initiated October of that year with a very modest appropriation and later expanded into the two billion dollar Manhattan Project had only one purpose to harness the energy of the atom in a chain reaction to produce a bomb that could be carried by aircraft if possible, and to produce it before the…