So, we all know that nuclear weapons have never actually been used in war... though of course, "country X nukes country Y" scenarios are common enough in AH scenarios... so let's ramp that up a notch, take two countries that have never been at war with each other in the modern age. Can you imagine a scenario where the United States of America drops nuclear weapons (a single bomb is alright too) on the Empire of Japan? Ideally, with a post-1900 POD.