This primary source comes from the Records of the Army Air Forces.
Full Citation: New York World's Fair in Flushing; 4/4/1940; New York - Flushing; "Airscapes" of American and Foreign Areas, 1917 - 1964; Records of the Army Air Forces, Record Group 18; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/worlds-fair-flushing, March 26, 2025]