With the success of the Manhattan Project and the Radiation Laboratory, MIT moved into a new era of " big science " funded by the US government. MIT's expansion in nuclear physics was spearheaded by Jerrold R. Zacharias, who went to Los Alamos late in the war, and recruited Viki Weisskopf and Rossi as MIT professors. Rossi left Los Alamos for Cambridge on 6 February 1946.