The Skylab 4 mission was launched by NASA, taking a crew of three astronauts to the US space station.
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The city of Havana, Cuba, celebrated its 500th birthday.
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.'
The Soviet Union's Venera 3 space probe was launched from the Baikonur Cosmodrome.
Nineteen countries vowed to gradually phase out coal at the United Nations Summit in Bonn, Germany.