Everyone is looking for a 'canary' to take into the mines of what used to be a 'safe' environment. The hysteria continues; initial gas price gouging, increased firearms purchases and panic buying of food. Surplus is a fascinating market. Items once common and virtually unsaleable are today's hot ticket. Gas masks have been purchased heavily by protestors involved in the WTO issue as a countermeasure to tear gas and pepper spray. I've seen all manner in use; Israeli, Soviet, U.S. issue and NATO. You will need to determine if the actual filter is interchangeable, ie. NATO with U.S. and how well they fit. Masks intended for troops may not fit a child.If the demand continues, the dealers will find supplies. Just prepare for sticker shock. If an attack were to occur, remember that there are many skin agents that do not require inhalation. <br><br>