Although it was formally an advisory body, the GAC normally carried great weight on scientific and technical matters. Among its members were Harvard president James Conant, and Nobel prizewinners Enrico Fermi and I.I. Rabi, as well as Oppenheimer.47 The GAC approved the build-up and diversification of fission weapons (including tactical weapons), endorsed preparation for radiological warfare, and supported the development of boosted fission weapons; but it unanimously opposed an all-out effort to develop the Super.
