Marvin Gaye was given a star on Hollywood’s Walk of Fame.
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American abolitionist David Walker published his appeal to the African American publications in Boston.
Elon Musk announced that he was building a spaceship called Starship that would travel to Mars and return to Earth.
Spanish explorer Juan Rodriguez discovered San Diego Bay and claimed it for Spain.
Medal of Honor was awarded posthumously to Theodore Roosevelt Jr for his help on D-Day.
The Prussian government lifted a ban on Adolf Hitler's speeches.
