I still reckon that at most, America was justified in maybe (just maybe) nuking the Japanese (or German) nuclear research facilities.
Luke,
we intentionally didn't take out the much more advanced german rocket/weapons program.
we let them work, didn't bomb them, didn't try to stop it. WHY?
Cause after the war, the german scientists were allowed to miss those Nurembourg trials and they all moved to Houston, TX. They formed NASA. They had a choice and most realized life in USA as a well paid scientist was better than war torn germany. Look at the original NASA member list. All germans, right after WWII.