The US Postal Service was founded.
Benjamin Franklin was named the first Postmaster General.
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Asiana Airlines Flight 733 crashed in South Korea.
Albert Einstein's theory of gravitational redshift was proven after a telescope in Chile observed a black hole.
Niger President Mohamed Bazoum was removed from office by a military coup.
The Summer Olympic Games opening ceremony was held outdoors for the first time ever.
Italian adventurer and author Giacomo Casanova was arrested in Venice for his offensive remarks on religion.
