Every Nuclear Explosion Since 1945

Here's a fascinating video representing every nuclear explosion since 1945.
As long-time friend and now Facebook friend Brian Rock pointed out, did you know there were 2 in Mississippi?

Missi--freakin'--ssippi?
One of the things about this that is especially illuminating to me---pun no way intended--is that so many of these blasts were tested by the US, the then Soviet Union and England on our own/their own land. England doing them in Australia.
It seems the height of irresponsibility and possible danger, to me.