This undated photo released by the McCallie School in Chattanooga, Tenn., on Tuesday, April 18, 2017 shows Jackson Standefer. On Saturday, April 15, 2017, Standefer, 14, and his step-grandmother, Lou-Ann Merrell, were swept down a remote creek in Grand Canyon National Park in Grand Canyon National Park. The family is holding out hope that the 62-year-old wife of a popular outdoor footwear company founder has the skills to keep them both alive until they're found, a family member said. (McCallie School, Chattanooga via AP)