Michael Phelps won the 100-meter butterfly swim in a record 50:58 at the Beijing Olympic finals.
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The first Winter Olympics medal was awarded to American Skater Charles Jewtraw after skating 5,000 meters in just 44 seconds.
The US won gold in the first-ever women's soccer at the Olympics.
USA's men's hockey team beat Canada's for the first time in 12 years.
Female rowing duo Heather Stanning & Helen Glover claimed Team GB's first Olympic medal at the London Olympics.
Australian swimmer Kyle Chalmers won the 100-meter freestyle gold medal in the Rio de Janeiro Olympics.
