One of the best parts of the Olympics is watching an athlete from your country dominate the competition. Katie Ledecky is one of those athletes this year. Carlo Zapponi and Apple Chan Fardel for the Guardian provide a recap of Ledecky’s world record performance in the 400-meter freestyle. Typically these races are close, but last night Ledecky might as well have been in the pool by herself.
Katie Ledecky domination charted
Life expectancy changes
The data goes back to 1960 and up to the most current estimates for 2009. Each line represents a country.
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