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Day 1: The best photos of the Olympics

U.S. swimmer Michael Phelps competes in the men's 400-meter individual medley final swimming event during the first day of Olympics competition in London on Saturday, July 28. Phelps failed to medal in the event, finishing fourth. <a href='http://www.cnn.com/2012/07/27/worldsport/gallery/olympic-opening-ceremony/index.html'>Photos: The opening ceremony</a>

U.S. swimmer Michael Phelps competes in the men's 400-meter individual medley final swimming event during the first day of Olympics competition in London on Saturday, July 28. Phelps failed to medal in the event, finishing fourth. Photos: The opening ceremony