Mark David Chapman pleaded guilty to the murder of John Lennon in New York.
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The United States Congress formally recognized the Pledge of Allegiance and added it to the Federal Flag Code.
UNESCO recommended that Australia's Great Barrier Reef be listed as World Heritage Site 'in danger.'
English navigator Henry Hudson, his teenage son, and seven supporters set adrift aboard a tiny boat on the Hudson Bay.
United States Naval Observatory astronomer James Christy discovered Pluto's largest moon.
The United States Department of Justice was formed.
