Former Pink Floyd star Roger Waters will help Newport Folk Festival officials celebrate the 50th anniversary of Bob Dylan's controversial electric guitar performance when he makes his first appearance at the Rhode Island event this summer (Jul15). Waters joins a bill that also features Sufjan Stevens, J Mascis and Iron & Wine. This year's Newport Folk Festival will mark the 50th anniversary of a 1965 protest, sparked by Dylan's first electric guitar performance. At the time, many fans were appalled by the folk legend's decision not to play acoustically, with many booing him and turning their back on his performance.