In addition, Strauss disliked Oppenheimer on a variety of personal grounds. Starting in 1947, Strauss had been in a dispute with the General Advisory Committee (GAC) of senior atomic scientists, which Oppenheimer chaired and which reported to the AEC, over whether exporting radioisotopes for medical purposes was risking U.S. security, which led to the scientists on the GAC having a poor image of Strauss. Then during a public hearing in 1949, the real physicist Oppenheimer had given a mocking answer to a point the amateur physicist Strauss had raised on the subject, a humiliation that Strauss did not forget. Strauss was also offended by Oppenheimer having once engaged in adulterous relations. And Strauss did not like that Oppenheimer had seemingly left his Jewish heritage behind, whereas Strauss had become successful – despite the anti-Semitic environment of Washington – while still maintaining his prominent roles in Jewish organizations and his Temple Emanu-El presidency.