The first commercial radio broadcast took place in Pittsburgh, PA on November 2, 1920. Soon, radios became almost a necessity even to those who could barely make ends meet. The radio changed communication, created a new form of entertainment, and changed how people were informed of current events and news. By 1929, Paul Galvin had invented the car radio, so even while traveling, people could hear news. By 1933, 60% of America’s households had radio.