Frenchman Henri Fabre flew the world’s first seaplane in Martinique, France.
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A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
The world's first weightlifting championship took place in London, England.
An Imperial Airways passenger aircraft crashed in Belgium, killing all fifteen on board.
Roman Emperor Valentinian I made his brother, Flavius Valens, his co-emperor.
The Vienna Philharmonic Orchestra performed its first concert.
