When I first read about Caroline Gaynor's work as a guide for visually-impaired triathletes, I thought, "That's so cool!" And then I had a bunch of questions. How do you pair up with someone who has similar abilities as a swimming, biker, and runner? How do you train together? How do you guide someone effectively when you're in open water surrounded by hundreds of other swimmers? How do you get involved with guiding to begin with? Is this a full-time job?