The city of Hiroshima, with a population of 350,000, had been razed.
According to Manhattan Project scientist Leo Szilard, Secretary of State Byrnes had said that the bomb's biggest benefit was not its effect on Japan but its power to "make Russia more manageable in Europe". General Leslie Groves, Director of the Manhattan Project, testified in 1954: "There was never, from about two weeks from the time I took charge of this Project, any illusion on my part but that Russia was our enemy, and that the Project was conducted on that basis." The United States was thinking post-war. A Venezuelan diplomat reported to his government after a May 1945 meeting that Assistant Secretary of State Nelson Rockefeller "communicated to us the anxiety of the United States Government about the Russian attitude".
from the explosion center)Nuclear bomb released by the US.

The memorial Cenotaph in Hiroshima was unveiled on August 6, 1952.
August 15
Emperor Hirohito of Japan, in a radio broadcast to his nation announces that Japan has lost the war. The Emperor's announcement is hard to understand because he speaks in archaic court Japanese, but one fact is understood: "Moreover, the enemy has begun to employ a new and most cruel bomb, the power of which to damage is indeed incalcuable, taking the toll of many innocent lives."
Hap Arnold asserted that conventional bombing could end the war.
Mr Yearout says Trinity paved the way for bringing an end to the war and saving many American and Japanese lives. "If we had gone into Japan, we would have encountered the worst fighting we ever had ever seen. We would have been there for four to six years."But 60 years on, debate still rages over whether the bomb was really necessary to force the Japanese to surrender.

The Atomic Bombings of Hiroshima and Nagasaki
3 at Tabata near Mojie in northern Kyushu come three ex-prisoners who have found the lure of the open roads irresistible after three years confinement and have come to Nagasaki in order to view the results of the atomic bomb.
Why Can People Live in Hiroshima and Nagasaki Now, …
"We contacted the Japs at seven in the morning. They opened fire at 8:30 a.m. We held out until 2 p.m., when a Jap spotter plane dropped a bomb near out stern and watched us go down.
Hiroshima: the Article - Doug Long
This triggered the signature-collecting movement against atomic and hydrogen bombs all over Japan, and thirty million signatures were collected in a year.