North Macedonia officially joined NATO, becoming the 30th member of the military alliance.
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Spanish explorer Juan Ponce de León accidentally discovered Florida.
The musical ''Singing in The Rain," directed by Gene Kelly and Stanley Donen, had its first theatrical run.
Two Boeing 747 planes collided in Tenerife, Canary Islands, Spain.
Frank Sinatra recorded his hit 'I'm a Fool to Want You.'
Martin Luther King's son met the man convicted of killing his father, James Earl Ray.
