A triathlon consists of a race in three parts: a 1,500-meter (4,921-foot) swim, a 40-kilometer (24.85-mile) bike ride, and a 10-kilometer (6.2-mile) run, in that order. Triathlons became an Olympic sport in 2000.

Photograph by Roberto Ojeda, MyShot

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2012 Summer Olympics
2012 Summer Olympics Article

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What are the Summer Olympics? 17 Days, 26 Sports, 200 Countries and 10,000 Athletes.