In 1947 Warren became the first dean of the School of Medicine at the University of California , Los Angeles ( UCLA ) . Under his leadership , the new school grew from nothing to a major medical school . Although controversial and opposed by James Bryant Conant , Warren would speak out about the dangers of nuclear fallout from weapons testing from about 1947 onwards and upon the Castle Bravo test in 1954 his views were lent some credence , which informed opinion leading up to the Partial Nuclear Test Ban Treaty . Warren became Vice Chancellor , Health Services in 1962 at UCLA . From 1963 to 1965 he served as special assistant to President John F. Kennedy and later Lyndon B. Johnson on mental retardation . Returning to UCLA in 1965 , he became professor emeritus , a position he held until his death in 1981 . In 1971 , he was awarded the Enrico Fermi Award for his contributions to science and medicine
Castle Bravo
Castle Bravo
Stafford L. Warren