Ghostbusters II was released in 2,410 movie theaters across the US.
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The longest papal reign began when Pope Pius IX was elected.
Cosmonaut Valentina Tereshkova became the first woman in space.
Pepsi Cola became an official trademark.
Henry Ford and 12 investors incorporated the Ford Motor Company in Detroit, Michigan.
The state of California began issuing marriage licenses to same-sex couples.
