The eighth day of the London Olympics was one of the busiest with 25 gold medals up for grabs.
Day 8 of Competition
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Nigeria's Regina George competes in the women's 400m semifinals at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London.
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US swimmer Michael Phelps poses after receiving the trophy of the greatest olympic athlete of all time after winning gold in the men's 4x100m medley relay final during the swimming event at the London 2012 Olympic Games on August 4, 2012 in London.
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US swimmer Michael Phelps (C) reacts with teammates Brendan Hansen, Nathan Adrian and Matthew Grevers after they competed in the men's 4x100m medley relay final during the swimming event at the London 2012 Olympic Games on August 4, 2012 in London.
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China's Sun Yang reacts after he won gold in the men's 1500m freestyle final during the swimming event at the London 2012 Olympic Games on August 4, 2012 in London.