the members are : admiral roscoe hillenkoetter ( the first director of the cia ) , dr. vannover bush ( organized the office of scientific research and development which led to the production of the first atomic bomb ) , admiral james forrestal ( secretary of defense ) , lt. general nathan twining ( commander of air materiel command ) , lt. general hoyt vandenberg ( air force chief of staff ) , dr. detlev bronk ( physiologist and biophysicist who chaired the national research council ) , dr. jerome hunsaker ( aircraft designer who chaired the departments of mechanical and aeronautical engineering ) , mr. sidney souers ( executive secretary to the nsc ) , mr. gordon gray ( assistant secretary of the army ) , dr. donald menzel ( director of the harvard college observatory ) , general robert montague ( base commander at the sandia aec facility ) , and dr. lloyd berkner ( executive secretary of the joint research and development board ) .