The state of California began issuing marriage licenses to same-sex couples.
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The rules for the Grammy Awards were updated to restrict AI-generated songs.
Washington National Airport became the US first federal airport.
Henry Ford and 12 investors incorporated the Ford Motor Company in Detroit, Michigan.
The Wizard of Oz was shown at The Chicago Grand Opera House for the first time.
Grease, starring John Travolta and Olivia Newton-John, was released in the US.
