Ivana Hughes

And those people were very, very sickened and impacted by the test.

It's a long story.

They stayed there for three days.

They were moved away.

But to skyrocket.

kind of cut to the present day, and this is actually from some of the research that I've done with colleagues and students at Columbia University.

Currently, there's still parts of the Marshall Islands where radiological contamination is very high, and that testing ended in 1958.

So it's now nearly seven years later and there's still contamination that quite simply is not safe.

The way I like to put it is it's not safe for a multi-generational community to live in and to live there full time.

Yes.

Over Times Square, one megaton bomb is going to have... So there's something that makes the numbers a little more complicated.

You can have two different kinds of explosions.

One can be an airburst and one can be a surface explosion.

The...

In the case of an airburst, what you actually do is you cause a lot more damage, a lot more the shock wave is sort of stronger and the destruction of the city is much more effective.

A surface burst produces more radiation and kind of more of those long-term effects.

So between the two, let's just say that basically the radius of this fireball is about a mile.

And so you now have, depending on where it explodes, you have a radius that, and the fireball is quite literally the temperature of the sun.

And so you have a fireball where everything is evaporated.

Absolutely evaporated.