 How do you stay on top as an Olympic athlete? Bethesda's Katie Ledecky, a seven-time gold medal winner in swimming, is telling her story in a brand new book. Ledecky says in the new book, Just Add Water, My Swimming Life, she's been able to compete for such a long time at such a high level because of balance in her life and having a loving family, but also by embracing the grind and discipline of swimming.