I remember reading a "National Geographic" back,I think, in the 1950s, in which there was an item about some fishermen who were found drifting about in their boat, out on the ocean (Pacific ?) and when rescued,they were all sick,with burns on their skin and metallic particles in their hair. It seems that they'd been through a radiation cloud ( without the benefit of "pre-wetting",which they probably didn't know about anyway )and fallout particles had stuck to them. I think it must have been from a British or French nuclear test ; does anyone out there know ??