On the night of July 25, 1965, Bob Dylan strode onto a stage at the Newport Folk Festival, plugged in an electric guitar and gave the music world a shock. Wearing a black leather jacket, the darling of the folk movement and singer of protest songs launched into a searing, distortion-filled, three-song electric set that brought boos from folk purists but thrilled others. Fifty years later, it’s considered one of the most important events in rock history, the high-voltage moment when Dylan broke away from folk and helped show fellow musicians the poetic possibilities of rock.