About the last commenter:
What U said was very untrue. And even if it was, you CANNOT trade a life for a life. If the USA leaders cared so much about the totall lives lost' Y didn't they shoot them selves in the head? or sacrifice their own families? or even surrender? Besides, the US already won the war. They were ready to give up. That was an act of retaliation, no more.
AND TRY EXPLAINING ALL OF THAT TO THE CHILDREN WHO DIED A HORRIBLE DEATH, OR TO THE PARENTS WHO HAD TO WATCH THEIR CHILDREN DIE.
(Sorry for the typos, English is my second language)