von hippel and his colleagues have worked on fissile material policy issues for the past 30 years, including contributions to: "ending the u.s. program to foster the commercialization of plutonium breeder reactors, convincing president gorbachev to embrace the idea of a fissile material production cutoff treaty, launching the u.s.-russian cooperative nuclear materials protection, control and accounting program, and broadening efforts to eliminate the use of high-enriched uranium in civilian reactors worldwide".