240,000 people died in the invasion of Okinawa, only 20,000 of them were Americans, ~100,000 were civilians. Who knows how badly further invasions of Japan would have gone?
To those who claim Japan was on the brink of surrender, why did it take a second bomb then? If they were so close, wouldn't the first have provided them all the incentive they needed?
People have their opinions, and it was a terrible thing that happened, but I don't question it, I feel the events of the time support the decision that was made.