Apologizing for the bomb this close to Memorial Day is roughly equivalent to talking about the Queen again on Independence Day.
Bill Whittle reminds you that we'd have a whole lot more people to remember this Memorial Day if we hadn't used them. Maybe a million more. A lot more Japanese would have died in the event of a conquest of the mainland, too.
Also, that they were warned five days before the bombing. He has the text from the leaflets we dropped warning people to flee, and promising peace if they would remove the military government and pursue peaceful relationship with us.
It takes some gall for a President with as much blood on his hands as this one, through his acts of omission in Iraq and Syria and his acts of commission in Libya, to shame a President who saved as many lives as Truman.
UPDATE: See the comments for a link to the text of a speech, as well as a debate about whether or not this speech constitutes an apology. Our own MikeD rules that it was not, in his opinion.