The moment 18-year-old Army Pvt. Tim Josephs arrived at Edgewood Arsenal in 1968, he knew there was something different about the place. It just did not look like a military base, more like a hospital," recalled Josephs, a Pittsburgh native. Josephs had volunteered for a two-month assignment at Edgewood, in Maryland, lured by three-day weekends closer to home. "It was like a plum assignment," Josephs said. "The idea was they would test new Army field jackets, clothing, weapons and things of that nature, but no mention of drugs or chemicals." But when he went to fill out paperwork the morning after his arrival, the base personnel were wearing white lab coats, and Josephs said he had second thoughts. An officer took him aside. "He said, 'You volunteered for this. You're going to do it. If you don't, you're going to jail. You're going to Vietnam either way -- before or after,'" Josephs said recently. From 1955 to 1975, military researchers at Edgewood were using not only animals but human subjects to test a witches' brew of drugs and chemicals. They ranged from potentially lethal nerve gases like VX and sarin to incapacitating agents like BZ. The military also tested tear gas, barbiturates, tranquilizers, narcotics and hallucinogens like LSD. Josephs, 63, believes the chemical agents he received during his two-month stint at Edgewood [harmed] him, triggering health problems that continue to plague him four decades later.