Truman had the means to end the war and save America and Allied lives, which was his responsibility as president. I do believe people who think it unjustified is an opinion that I respect, for it did cause immense devastation. But as commander-in-chief, Truman's responsibility was to America and allied lives and winning the war. To not use the weapon would have been dereliction of duty on Truman's part.

no no no dont you see, not atomising those slurs would've in fact been worse because proud AMERICAN lives might've been lost

edit: goddamn there's a fucking chorus of "bombs saved lives" libs, just jerking themselves off about how justified it was to bomb civilians because the japanese army did warcrimes. Very Cool