In this episode of Unfiltered Waters, Elizabeth Beisel and Todd Anderson fill in for Katie Hoff, about a week out from giving birth, and sit down with Olympic medalist Katharine Berkoff right before the Pan Pacific Championships. She's coming off a hard lesson in Singapore last year: getting sick and having to trust her training instead of her control. The 100 back is the race she says has her heart. So what does it take to let go of what you can't control and still call it a successful meet?...