Fifty years ago, the US Navy locked 17-year-old Glenn Jenkins into a gas chamber within sight of the dome of the US Capitol in Washington. It then poisoned him with mustard and lewisite (arsenic) gas. He never recovered his good health. Nathan Schnurman, another 17-year-old, was asked to test summer uniforms for the navy. He was locked in a small hut heated by a furnace and with a door that could be opened only from the outside. When something went wrong with his mask, he asked over the intercom to come out, but was refused. He vomited into his mask, passed out and had a heart attack. The plight of Mr Jenkins, Mr Schnurman and 2,500 other sailors who were used in what the navy called 'man break' experiments with poison gas, has remained a secret for five decades. Only last week, under pressure from the victims, did the Pentagon agree to let them tell their stories. Many, who had been told that the Espionage Act would be used against them, did not even tell their doctors what had happened. All the survivors, now in their late sixties, tell similar stories. The navy not only volunteered its own men, but for decades after the war also refused to compensate them for crippling injuries. [And] the experiments were for nothing. Mustard gas was used just once in the Second World War by the Allies, and then by accident.