 He was also involved in advising the making of many propaganda films and, therefore, got to know directors such as Joris Ivens who did "Action Stations" and "Corvette Port Arthur" for the NFB.The Academy of Motion Picture Arts and Sciences (AMPAS) awarded a special Oscar for the work that the NFB did during World War II.In 1945, when Grierson was preparing to leave the NFB, he suggested Ross as one of three possibilities for his replacement; however, Prime Minister William Lyon Mackenzie King decided instead to downsize the NFB since the war was over.