Adolf Hitler and Benito Mussolini met in Salzburg, Austria.
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Pyotr Ilyich Tchaikovsky composed his 'Swan Lake' ballet.
Twenty million Americans mobilized to call for greater protections for our planet. This became the world's first Earth Day.
Michael Moorer claimed the heavyweight boxing title after smashing Evander Holyfield in Paradise, Nevada, US.
Edward & Sarah Bishop and seven others were examined by Magistrates in Salem, Massachusetts, for witchcraft.
General Laborer Thomas Stevens started his first bicycle trip around the world.
