The Post Office is born, World War II gets its first flying ace, John Glenn becomes the first American to orbit the Earth, and a fire at a Great White concert leaves 100 dead, all on this day.
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Courtesy of American Library Association
1952: Emmett Ashford becomes the first black umpire in organized baseball by being authorized to be a substitute umpire in the Southwestern International League. He would go on to an umpiring career that would also see him become the first black umpire in Major League Baseball on April 9, 1966.