John Lennon’s album “Walls and Bridges” was released in the US.
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Julian Assange launched WikiLeaks.com.
Sputnik 1 became Earth's first artificial satellite to go into orbit.
Pope Gregory XIII introduced the concept of the Gregorian Calendar to Europe.
The pocket watch patent was awarded to Dutch mathematician and scientist Christiaan Huygens.
Gutzon Borglum began sculpting Mount Rushmore.
