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Warren G. Harding
Warren G. Harding was elected President in 1921. He remained President until 1923, when he had a heart attack. -
Calvin Coolidge
Calvin Coolidge became President after Harding's death in 1923. He remained President until 1929. -
Alexander Fleming creats penicillin.
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Herbert Hoover
Herbert Hoover was elected President in 1929 and remained President until 1933 -
US stock market crashes
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Empire State Building construction is complete.
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Franklin D. Roosevelt
Franklin D. Roosevelt was elected President in 1933 and remained President until 1945. -
Einstein comes to America.
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World War II begins