Adolf Hitler appointed himself as the head of the Armed Forces High Command.
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Doctors in New York successfully performed the world's first face and double hand transplant.
The first Mormon Pioneers left their homes in Nauvoo, Illinois, and began the long trek to the Salt Lake Valley.
The Codex Sinaiticus – one of the oldest known copies of the bible – was discovered in Egypt.
Mark Zuckerberg founded the social networking website Facebook.
The US Military shot down a Chinese high-altitude surveillance balloon.
