New York became the 11th state to join the United States of America.
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Asiana Airlines Flight 733 crashed in South Korea.
The Summer Olympic Games opening ceremony was held outdoors for the first time ever.
Albert Einstein's theory of gravitational redshift was proven after a telescope in Chile observed a black hole.
President Donald Trump banned transgender persons from joining the US military.
Francisco Pizarro became the Governor of Castile, which is a historic area of modern-day Peru.
