If our government believes in the slightest that terrorists have the capability of exploding a dirty bomb, then why aren't they making potassium iodine pills available to people who live in NYC / DC? At the very least, they should stockpile a few million pills just in case this does happen. Many european countries make them available to citizens who live near nuclear power plants. Wouldn't this make sense? I don't see how duct tape is going to seal out radiation.