We bombed industrial and military targets. Unfortunately civilians lived nearby. The prez was correct in not offering any apologies. Why apologize for ultimately saving American and Japanese lives that would have been lost if we would have invaded Japan.
The war ended over 70 years ago.
At least one reason an unconditional surrender was sought wasn't to end the war or "save lives" , it was to provide cover for the future occupation of Japan by the USA military...that is self evident since the occupation continues today.
I ascribe to a "proportionality argument" rationale and reason if individual real people are opposing combatants, say two guys duking it out, the nature of morality doesn't shift if the number of people involved becomes greater or some "official" declares an action a war.
For instance, if you or I repel an offensive attack, with defensive force, our actions are justified, but to kick a down and defeated man when he is clearly defeated goes beyond self defense. If two people were engaged in a fight, I'd say once your opponent is rendered incapable of doing anything offensive, it's time to end the fight and stop using force. Figuratively speaking, the USA kicked innocent people (vaporized civilians) and then occupied their house and continues to today.
If we allow "the rules of morality" to shift when the scale of the fight goes from one man against another to a much larger scale, we are admitting that government can cast aside morality when it is convenient and that some people have a license to use force that goes beyond defensive force and becomes offensive force.