KINGSPORT — As Dobyns-Bennett High School’s competitive marching band prepares for its annual appearance on the national stage in Indianapolis, band members are reflecting on nervousness as well as honoring the band parents who help make the competitive show possible. Tuesday afternoon at 5:15 p.m. at J. Fred Johnson Stadium, Kingsport Mayor John Clark was expected to honor the “black shirts,” parents of the marching Indians, who work behind the scenes and, among other things, help set up and dismantle the competitive band show platforms and other props.