At the conclusion of World War II, the United States was surprised to discover that the Germans had developed a new class of chemical agents – nerve agents. The Russians captured a German tabun (nerve agent GA) production plant, moved it to Russia and made GA their standard nerve gas. The United States adopted sarin (nerve agent GB), also discovered by the Germans, as our standard nerve agent. By the early 1950s, the United States believed it lagged behind the Soviet Union in the development of chemical agents. It was in this context that the United States accelerated its chemical warfare research and development efforts. As part of this accelerated program, experimenters used service members as human volunteers to determine the effects of chemical agents, as well as to develop therapeutics and prophylactics.