Courtesy of the artist The Thistle & Shamrock was launched to an unsuspecting public radio audience across the U.S. on June 4th in the early 1980s. What's changed in the world of recorded music — those with Celtic roots — since those days? What endures? Find out with artists Battlefield Band, Martyn Bennett, Jig Jam and Natalie MacMaster. Copyright 2021 NPR. To see more, visit https://www.npr.org.