David Rockefeller his graduate studies, he received a Ph.D. from the University of Chicago in 1940. After completing his studies in Chicago, he became secretary to New York Mayor Fiorello La Guardia for eighteen months in a "dollar a year" public service position. Although the mayor pointed out to the press that Rockefeller was only one of 60 interns in the city government, his working space was, in fact, the vacant office of the deputy mayor. From 1941 to 1942, Rockefeller was assistant regional director of the United States Office of Defense, Health and Welfare Services. Rockefeller enlisted in the U.S. Army
Rockefeller Center to make a profit on the site as quickly as possible, Rockefeller devised new plans within a month so that the site could become profitable. The developers entered into talks with Radio Corporation of America (RCA) and its subsidiaries, National Broadcasting Company (NBC) and Radio-Keith-Orpheum (RKO), to build a mass media entertainment complex on the site. By May, RCA and its affiliates had made an agreement with Rockefeller Center managers to lease space and develop part of the complex. Todd released a new plan "G-3" in January 1930. Two months later, an "H plan" was released with facilities for "television,