Wendell Niles, the "man on the street" reporter after the big dust storm, was a real radio announcer. He worked on many shows of the golden-age of radio including "The Burns and Allen Show."
Two of the movie's main characters are introduced via a radio program called "We The People." This was a real radio show that ran on the CBS blue network (originating on WABC, New York) from circa 1937 to circa 1949. The sponsor was Calumet Baking Powder. The show was created by Phillips Lord (of "Gangbusters" fame) to give "a half-hour to the people of this country so we can hear their experiences." The radio program shown in this movie is essentially the same as in real life--real people spoke at the microphone telling their own stories.
Douglas Evans, shown as the master of ceremonies for the radio show "We The People," was a radio announcer in real life. He worked for KFI (Los Angeles) in the 1930s.
The telegram shown early in the film was sent to CBS in NYC by John Phillips in North Dakota.
Italian censorship visa # 10706 delivered on 15 November 1951.