![Japanese Army Self-Defense Forces in gas masks take part in a drill to prepare against possible radiological attacks, in Tokyo November 7, 2008. REUTERS/Kim Kyung-Hoon (JAPAN Stock Photo - Alamy Japanese Army Self-Defense Forces in gas masks take part in a drill to prepare against possible radiological attacks, in Tokyo November 7, 2008. REUTERS/Kim Kyung-Hoon (JAPAN Stock Photo - Alamy](https://c8.alamy.com/comp/2D1NK5T/japanese-army-self-defense-forces-in-gas-masks-take-part-in-a-drill-to-prepare-against-possible-radiological-attacks-in-tokyo-november-7-2008-reuterskim-kyung-hoon-japan-2D1NK5T.jpg)
Japanese Army Self-Defense Forces in gas masks take part in a drill to prepare against possible radiological attacks, in Tokyo November 7, 2008. REUTERS/Kim Kyung-Hoon (JAPAN Stock Photo - Alamy
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![Japanese safety equipment manufacturer Koken Ltd employee Kumiko Rikiishi demonstrates a gas mask, one of their products, at their main office in Tokyo September 26, 2001. Japanese department stores are doing brisk Japanese safety equipment manufacturer Koken Ltd employee Kumiko Rikiishi demonstrates a gas mask, one of their products, at their main office in Tokyo September 26, 2001. Japanese department stores are doing brisk](https://c8.alamy.com/comp/2D4DC14/japanese-safety-equipment-manufacturer-koken-ltd-employee-kumiko-rikiishi-demonstrates-a-gas-mask-one-of-their-products-at-their-main-office-in-tokyo-september-26-2001-japanese-department-stores-are-doing-brisk-trade-in-disaster-supplies-with-anti-smoke-and-anti-dust-masks-flying-off-the-shelves-after-the-attacks-on-new-york-and-washington-2D4DC14.jpg)