 | 1930 - The planet Pluto is discovered |
 | 1931 - Al Capone jailed for Tax evasion |
 | 1932 - Franklin Roosevelt wins election by a landslide |
 | 1932 - Radio waves discovered from space |
 | 1933 - 21st amendment to the U.S. Constitution is ratified -
repealing the 18th amendment (Prohibition ends) |
 | 1933 - The New Deal |
 | 1935 - 1st Nylon developed |
 | 1935 - Alcoholics Anonymous organized in New York |
 | 1935 - U.S. suffers through the Dust Bowl |
 | 1936 - Ford Foundation established |
 | 1936 - 1st successful helicopter flight |
 | 1936 - Life magazine founded |
 | 1937 - 1st programmable calculator developed |
 | 1938 - 1st photocopy |
 | 1939 - John Steinbeck publishes "The Grapes of Wrath" |
 | 1939-Commercial television introduced in the U.S. |