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At 31, Michael Phelps became the oldest swimmer to win an individual event. Katie Ledecky won her second race in Rio. And Simone Biles led the U.S. gymnastics team to a win of historic proportions.
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Katie Ledecky won a gold medal in the women's 200-meter freestyle at Rio's Summer Olympics on Tuesday, in a race that was close — but not as close as the one Michael Phelps swam.
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You can't follow everything in Rio, but you want to catch the highlights. Here's a guide to the American athletes and events likely to produce the most memorable performances.