Australian swimmer Kyle Chalmers won the 100-meter freestyle gold medal in the Rio de Janeiro Olympics.
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Queen Elizabeth II of England declared the 30th Olympics opened in London, UK.
USA's men's hockey team beat Canada's for the first time in 12 years.
The first modern international Olympic Games began in Athens, Greece.
Fifteen-year-old Tara Lipinski became the youngest Olympic figure skating gold medalist.
Charlotte Cooper won a gold medal, making her the first individual female Olympic champion.
