President Warren G. Harding became the first president to pay taxes in the US.
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US president Bill Clinton tore his knee and required surgery.
The first theater with a movie being projected from the back of the room was opened in New York City.
The population of space hit a new record with 13 astronauts.
German inventor Ferdinand von Zeppelin granted a patent for the navigable balloon.
Google employee Emma Haruka Iwao broke a world record by calculating Pi right down to 31.4 trillion digits!
