President Donald Trump banned transgender persons from joining the US military.
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Platform diver Tom Daley won his first Olympic gold medal in men's synchronized diving, 13 years after his first Olympic games.
As part of the War of the Roses in England, the Battle of Edgcote took place.
Francisco Pizarro became the Governor of Castile, which is a historic area of modern-day Peru.
New York became the 11th state to join the United States of America.
President Harry Truman signed the National Security Act.
