In pictures: Nagasaki bombing - 9 August 2015
"On 9 August 1945, the US dropped the second atomic bomb ever deployed in conflict, hitting the Japanese industrial city of Nagasaki.
Six days later, Japan announced its surrender.
At least 74,000 people died in the Nagasaki blast or from subsequent injuries.
Some 140,000 people had died three days before in Hiroshima, in the world's first nuclear attack."
The Longer View: Nuclear explosion - Timeline with VIDEOS - 6 August 2015
"Seventy years ago the world first witnessed the devastating power of nuclear weapons as atom bombs were dropped on the Japanese cities of Hiroshima and Nagasaki. Fear of a repeat dominated the subsequent Cold War.
There were alarmist information campaigns and mass protests calling for nuclear disarmament, but that did not stop a significant proliferation of nuclear weapons, and the US drawing up the ‘star wars’ programme to defend itself from space."
List of links to articles about the first atomic bombing.
Neatorama also has some essential reading material on the subject: