I have 50+ NBC masks that I have left over from when I sold them pre Iraqi invasion days. To be honest, Gas and biological masks, and suits would be the safest way to go. Of course it would be your best bet to stay indoors, but staying inside doesnt keep radio active chemicals from affecting you. Though a nuclear attact is not likely, accidents are. Many might not know this, but before we went into iraq, thousands of americans purchased NBC masks in fear of a biological or chemical terrorist attack. Its not likely, but the threat is real. It takes one person, with one mind-set, with one suitcase, in one city or stadium; to cause thousands of deaths. We dont live in a pretty world, as Im quite sure you all realize.