Oklahoma became the 46th state to join the United States of America.
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Rapper Dr. Dre released his second album, 'The Chronic 2001.'
Nineteen countries vowed to gradually phase out coal at the United Nations Summit in Bonn, Germany.
Queen Elizabeth II had hip surgery at King Edward VII Hospital.
The city of Havana, Cuba, celebrated its 500th birthday.
The Model M Postage Meter was put into commercial use.