| | The mass production of affordable cars had a tremendous effect on society, influencing everything from teenage life to families moving to the suburbs with the father commuting to work each day. Arrival of the airplane also had an enormous impact, with Charles Lindbergh flying solo for the first time from New York to Paris in 1927. Amelia Earhart was the first woman to cross the Atlantic by solo flight, in 1932. | | The mass production of affordable cars had a tremendous effect on society, influencing everything from teenage life to families moving to the suburbs with the father commuting to work each day. Arrival of the airplane also had an enormous impact, with Charles Lindbergh flying solo for the first time from New York to Paris in 1927. Amelia Earhart was the first woman to cross the Atlantic by solo flight, in 1932. |
| − | In 1920, KDKA in Pittsburgh, Pennsylvania, became the first commercial radio station, and radio quickly developed into the center of entertainment for families. Use of radio spread most quickly in the United States, where there is freedom of speech, and slowly in other countries where speech is controlled or regulated by the government. Movies caught on in the 1920s in silent form and then, with sound, in the late 1930s. The Wizard of Oz in 1939 was the first color movie. | + | In 1920, KDKA in Pittsburgh, Pennsylvania, became the first commercial radio station, and radio quickly developed into the center of entertainment for families. Use of radio spread most quickly in the United States, where there is freedom of speech, and slowly in other countries where speech is controlled or regulated by the government. Movies caught on in the 1920s in silent form and then, with sound, in the late 1930s. ''The Wizard of Oz'' in 1939 was the first color movie. |