User blog comment:Bobalugee1940/A day not so infamous.../@comment-32656-20110818000917

The Bomb was already well under way by that point. At most, production gets delayed a few months while resources are devoted elsewhere.

Longer, for sure. But probably not bloodier, actually. I'd even say less so, in most regards, since there is more time for better American planes and better training too, before they get thrown into fighting.