Vijaya Srivastava, who lives in the San Francisco Bay Area, took her first swimming lesson at age 68. She’s now a daily swimmer. Credit...Video by Aubrey Trinnaman for The New York Times Supported by ...

Those are the words that stick with 29-year-old Candace Thome when she learned that her nearly 2-year-old brother, Brayv, had fallen into her family’s pool in 2011. Brayv would not survive. He had ...