CHATTANOOGA, Tenn. (AP) — Bryan Johnson, who is finishing up his first year at the helm of Hamilton County Schools, wasn't the only new face to come to town in 2017. With him came a first-grader, a high school senior and a fiercely successful partner: his wife, Candy Johnson. Now, together, the Johnsons plan to use their expertise and drive to change Chattanooga, using the values and lessons they've learned along the way.