Mark David Chapman pleaded guilty to the murder of John Lennon in New York.
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United States Naval Observatory astronomer James Christy discovered Pluto's largest moon.
American gangster John Dillinger died from gunshot wounds at age 31.
The Royal Observatory in Greenwich, England, was founded by King Charles II.
Disney's classic movie 'Lady and the Tramp' was released in theaters in the US.
The United States Congress formally recognized the Pledge of Allegiance and added it to the Federal Flag Code.
