Mark David Chapman pleaded guilty to the murder of John Lennon in New York.
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Disney's classic movie 'Lady and the Tramp' was released in theaters in the US.
United States Naval Observatory astronomer James Christy discovered Pluto's largest moon.
Disney's 'The Rescuers' was released.
American gangster John Dillinger died from gunshot wounds at age 31.
UNESCO recommended that Australia's Great Barrier Reef be listed as World Heritage Site 'in danger.'
