[GOPJ]

Anyway, he said that we should have dropped the bomb offshore, to show the Japanese how powerful it was, then tell them that the next one was coming their way if they didn’t surrender.

If we had 20 bombs it might have worked - but picture a scenario where the first bomb went off as planned and the second one was a dud. Fighting would have continued fighting - with many more dead on both sides - and an uncertain outcome. People forget we weren't 'holding back' like we did in Vietnam - we were fighting World War II with everything we had - and - for much of the war - it was a toss up.

[Myrddin]

Two designs were deployed that day. An implosion weapon and a gun assembled device. The implosion weapon was the design that was uncertain. It required less material, but much higher precision. The gun assembled device required more material, but is a sure fire design. The Little Boy gun assembled was used first on Hiroshima. The Fat Man implosion device was dropped on Nagasaki. It had a higher yield with less material, but the target/deployment did less damage due to terrain effects.