Oklahoma became the 46th state to join the United States of America.
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The Skylab 4 mission was launched by NASA, taking a crew of three astronauts to the US space station.
The first edition of America's oldest newspaper, The New York Evening Post, was published.
American singer Mario released his hit single 'Let Me Love You.'
Rapper Dr. Dre released his second album, 'The Chronic 2001.'
The fourth largest diamond was found in Karowe Mine, Botswana.
