They also discussed gas masks. He recommended getting the Israeli civilian mask and replace the old filter in it with a UFM95 filter. (He said the Russian and East German masks were junk.)
For more details on the show, go to Artbell.com archives for October 1, then curser down to October 4.
getting the Israeli civilian mask
Those are good masks, and the only ones I know of that come in 2 smaller sizes for children ( ! ! ! )- something a lot of people don't even think about. Far as I recall, they take a standard NATO thread ( think it's M-45 ) canister, so you can use various types of filters from other sources as well.
Remember, your best weapon, and best defense, is your mind- arm yourself with knowledge.