Actually i got a true story about this... (Score 5, Interesting)

My grandfather's ship was nuked. Yup. What happened was they were going to test out the weapon, so they gave the crew a brand new ship, and their old ship, along with others, were docked in a bay and nuked. Then the crew, including my grandfather, swept the radioactive dust off the deck and went back to work. He was fine, but there was a very high cancer rate amoung veterans. He never got cancer in all his life. Also, regarding the spread of radioactive dust in the US, because of this, most people do have harmless accumulations of radioactive isotopes in there bodies.