The disintegrating walls have created an estimated four tons of black, radioactive dust.

Keith Chalkley ends his report saying winds were carrying the radioactive dust across Europe.

And even radioactive dust showers could have "dire consequences" for Earth below.

This door, this spanner -everything's getting touched with radioactive dust.

The fallout from the explosion dropped thousands of tons of radioactive dust over the city.

Sam watched helplessly as Vienna ran through the clouds of radioactive dust without her protective hood.

I'd say it has to be radioactive dust.

As he flew north, Maultsby activated a giant filter paper mechanism to scoop up radioactive dust.

So in January the northern winds carry the radioactive dust from the fall-out down into Malaya, say.

The bursting of the bombs would pulverise these shells into a fine, pervasive and strongly radioactive dust.

It is also spraying resin onto radioactive dust to keep it from being carried in the wind.

Out here, the radioactive dust was not so much of a problem; the danger lay in the heat.

A fire began to spread throughout the core of the Windscale nuclear reactor, sending radioactive dust across Britain.

By midday every major Middle Eastern city was flattened and simmering in piles of rubble, debris, and radioactive dust.

It became bathed in radioactive dust and was left to rust in the exclusion zone, where it remains to this day.

Visitors are told not to touch anything or even sit down, and are swept for radioactive dust before they can leave.