On August 9, 1945, another American B-29 bomber, Bock's Car , left Tinian carrying Fat Man , a plutonium implosion-type bomb. The primary target was the Kokura Arsenal, but upon reaching the target, they found that it was covered by a heavy ground haze and smoke and were unable drop the bomb. The pilot, Major Charles Sweeney, turned to the secondary target of the Mitsubishi Torpedo Plant at Nagasaki. The bomb exploded at 11:02 . over the narrow Urakami Valley northwest of downtown Nagasaki. Of the 286,000 people living in Nagasaki at the time of the blast, 74,000 people were killed and another 75,000 sustained severe injuries. The damage was less extensive, since the blast was boxed in by the river valley and partly to the fact that the bomb was dropped about 2 miles off target.
To their dying day, there were senior White House officials who believed the bombings were unnecessary
Surprisingly, there was no shortage of men in the president’s inner circle who objected to atomic bombs being used against Japan. The chairman of the joint chiefs of staff even called them “barbarous.” But one of the most poignant critics was John McCloy, the assistant Secretary of War. Early plans for the end of the war had demanded unconditional surrender for Japan, save for one concession: The country would be able to retain its emperor as a powerless figurehead. However, this was later struck from surrender terms presented to Japan before the bombing. As men like McCloy would learn after the . had occupied Japan, the issue of emperor retention was indeed a key reason driving Japanese holdout. “I believe we missed the opportunity of effecting a Japanese surrender, completely satisfactory to us, without the necessity of dropping the bombs,” McCloy was quoted as saying in Deadline , a book published two years after his death.