I don't know that I'm entirely qualified to talk about the problem with the carrier Nimitz, though I don't think George W. Bush, stupid as he is, is planning on going to war with a nuclear super power like China anytime soon, seeing as how he can't even handle the occupation of a considerably smaller country like Iraq.
Moreover, and perhaps foremost I'm a bit confused how the Nimitz and the dropping of the bomb are related, but I'll put in my two cents about Hiroshima and Nagasaki, seeing as how that really seems to be the main topic of debate here.
Like pierrot said, it's a complex issue. I really don't feel that Hiroshima or Nagasaki were good targets, PERIOD, though I'm not sure any target really would have been good for that thing (but certainly less atrocious; Nagasaki carried the largest Christian population in Japan, it was not a military target or even a real industrial center for production). While there were more Japanese with anti-war sentiments than realized, and unfortunately more than realized today, I think ONE bomb, NOT TWO, needed to be dropped somewhere.
I don't know, nor do I think anyone knows (or knew for that matter; especially if the bomb didn't work which seemed a possibility at the time and would be humiliating to say the least) if a public demonstration for Japan's top military and/or political figures would have gotten a surrender. Some top military officials were indeed ready to send the Japanese population to their deaths (as had been done in previous battles, regardless of whether the soldiers really felt the war was justified) even after Nagasaki. There's an interesting sounding Toshiro Mifune movie that I wanna see (TOSHIRO MIFUNE RULES! :
samurai: ) about the tension between military and political officials as to whether to surrender, but I can't seem to get a hold of it.
Anyways, invading Japan was not a decent alternative at all either, and was worse, because besides thousands of Americans dying (too much at the forefront of American minds is just AMERICAN lives rather than just lives) hundreds upon thousands if not millions of Japanese would have died. I say that not because all Japanese were subconscience fanatics as atypically portrayed (they were NOT), but because of the subconscience fanatics that were unfortunately in charge (as usually are in a totalitarian government; fall of Germany was bad, Hitler condemned his whole nation of people to go down with him, which fortunately didn't happen).
Totalitarian Japan MIGHT BY
SOME be argued to be more evil than the bomb, as it killed a larger number of innocent people (yes civilians, men, women, and children) in mainland asia, but then the U.S. doesn't care enough about that once again because those weren't "AMERICAN" lives. If the fire bombs turned your stomach, then good, because it should. Though if you haven't already I would suggest researching into some of these things below (I might advise you personally not to check out pictures or videos too much if you have a weak stomach though):
Japanese war crimes - Wikipedia
Battle of Changde - Wikipedia
Comfort women - Wikipedia (heavily debated by many Japanese; research it and then take it or leave it)
Kaimingjie germ weapon attack - Wikipedia
Nanjing Massacre - Wikipedia
Manila massacre - Wikipedia
Sandakan Death Marches - Wikipedia
Sook Ching - Wikipedia
Unit 731 - Wikipedia
Unit 100 - Wikipedia
Unit Ei 1644 - Wikipedia
Unit 8604 - Wikipedia
https://en.wikipedia.org/wiki/Unit_200
Unit 9420 - Wikipedia
About 8.4 million unarmed civilians (men, women, children right down to the infants) are have been confirmed as intentionally killed by the Japanese during the war in China, about 3 million in Korea, and I've been doing research but have yet to find a number for Singapore. Those are just the wikipedia links, you can find plenty more though about any one of those through a simple search. You want more solid evidence, I can provide though probably shouldn't on this thread as is not the topic. Now, these atrocities were bad, the average Japanese soldier WAS NOT responsible. Some soldiers however, if they refused to take part in atrocities, not only endangered his own life but that of his family.
People are human beings, and need understanding, our enemies, heirgo, are not people, but the extremist ideologies, which can be found in every country in the world (U.S., Japan, China, Germany, Chad and the Sudan it would certainly seem, etc.). There are many people in every country, and in every country there, even those with oppressive rules, there will always be MANY who are compassionate as opposed to cynical and nationalistic, as is what leads people like Hitler, Stalin, Hideki Tojo, Mao Tse-Tung, etc. coming to power.