I would have supported both given what they knew then. Given what I know now, only the first - my understanding is that they wanted to surrender after the first, but the effects of EMP had knocked out their communications and there was much confusion. I probably would have spaced out the second bombing more as well as have sent an ultimatum to see if it wasn't necessary.
^^^^^
That is odd because from the research I did for a paper a few years ago it seemed like Japan believed we'd never drop another one so they weren't going to surrender after the first one.
It was only what I'd heard. That could also be right.