Hi Peeples, CNN had an expert on radiation as a guest today. He said if one is exposed they can take an iodine pill as long as it is taken in the 24 hours after exposure. He said all it takes is one pill which would be for light exposure from a cloud. He said the radiation doesn't stay aloft very long. Later I heard there are many variables, like the amount of radiation you are exposed to and for how long.
I remember reading about the bombs we dropped on Nagasaki and Hiroshima and how deadly the radiation was. It never hurts to look back and I found this:
http://www.fogonazos.es/2007/02/hiroshima-pictures-they-didnt-want-us_05.html