where he met other prominent physicists such as Niels Bohr and P.A.M. Dirac.
Upon his return to the United States, he became a professor of physics at the University of California at Berkeley and California Institute of Technology. In 1943 Oppenheimer selected the Los Alamos site for the laboratory. After the war he resigned his post, and from 1947 to 1966 he was the director of Princeton’s Institute for Advanced Study.
In 1954, during the period of anti-Communist hysteria promoted by Senator Joseph R. McCarthy of Wisconsin, the
