> In contrast nuclear tests and power are usually well contained exactly because of the high risks I was thinking more of the open air tests undertaken around

> In contrast nuclear tests and power are usually well contained exactly because of the high risks I was thinking more of the open air tests undertaken around the world - for example Castle Bravo in the Pacific where "The fallout spread traces of radioactive material as far as Australia, India and Japan, and even the United States and parts of Europe". https://en.wikipedia.org/wiki/Castle_Bravo https://en.wikipedia.org/wiki/Castle_Bravo The increase in Carbon-14 in the atmosphere due to nuclear tests is large enough to be detected in all living organisms: https://en.wikipedia.org/wiki/Bomb_pulse https://en.wikipedia.org/wiki/Bomb_pulse