The Final Five, Katie Ledecky, Allyson Felix and friends visit Barack and Michelle Obama.
You can't throw a strike with all that hardware around your neck.
Ledecky returned to a hero's welcome
Learn from the expert.
First one in, last one out, wins gold medals.
She turns nearly a one-second deficit into a two-second advantage.
There are some familiar names like Michael Phelps, but other are ready to become stars.
In her most vulnerable race, Ledecky fends off Swede.
She's expected to break records, he's already broken records, and they're off to a commanding start.