Yes, they were close. Well, I might argue that the first atomic weapons test was less morally reprehensible. No one, and I do mean NO ONE, truly understood what atomic weaponry was capable off. They didn't, couldn't possibly, realize what it meant to unleash the power of nuclear flame. They saw it on paper, they saw it on maps, but their minds could not have comprehended what they were about to do.
There was no such excuse for the second bomb.