Rock engraving throws spotlight on Australia’s top-secret World War II mustard gas program – ABC News

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In 1943, Ross Ashley Bryan carved his name, the date, and his place of birth, into a rock outside an old NSW railway tunnel. Nearly 80 years later, that small act reveals his involvement in Australia’s classified mustard gas program.

Source: Rock engraving throws spotlight on Australia’s top-secret World War II mustard gas program – ABC News