 In spite or perhaps because of his role in these nuclear tests , Reines was concerned about the dangers of radioactive pollution from atmospheric nuclear tests , and became an advocate of underground nuclear testing . In the wake of the <unk> crisis , he participated in John Archibald Wheeler 's Project 137 , which evolved into <unk> . He was also a delegate at the <unk> for Peace Conference in Geneva in 1958 . 
