1931
Radio-astronomy was born when a technician at Bell Laboratories detected radio emissions from the Milky Way.
The Ford Motor Company turned out its 20,000,000th car.
The total of American banks that had failed since the stock market crash of '29 approached 2,500 and 5,000,000 were unemployed.
Chicago gangster Al Capone was convicted of tax evasion and sentenced to 11 years. Mob kingpin Legs Diamond was shot to death in Albany, New York.
The Star-Spangled Banner was chosen over America The Beautiful as the U.S. national anthem.
Eugene O'Neill's 6-hour trilogy, Mourning Becomes Electra, opened in New York.
