The state of California began issuing marriage licenses to same-sex couples.
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Donald Trump announced he was running for President.
Washington National Airport became the US first federal airport.
IBM was founded as the Computing-Tabulating-Recording Company in Endicott, New York.
Henry Ford and 12 investors incorporated the Ford Motor Company in Detroit, Michigan.
Ghostbusters II was released in 2,410 movie theaters across the US.
