Going nuclearSeventy 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
![BBC - iWonder - The Longer View: Nuclear explosion](https://cdn-ak-scissors.b.st-hatena.com/image/square/8c169ded7e261816a9c98b5cd55a3aa4db2ecb2f/height=288;version=1;width=512/https%3A%2F%2Fichef.bbci.co.uk%2Fimages%2Fic%2F208x208%2Fp02yt3qx.jpg)