Joan Baez and Bob Dylan performing at the Newport Folk Festival at Freebody Park on Rhode Island, USA, 23rd-26th July 1964. (Photo by Gai Terrell/Redferns/Getty Images)
Bob Dylan and Johnny Cash perform together with acoustic guitars on 'The Johnny Cash Show' on June 7, 1969 in Nashville, Tennessee. (Photo by Michael Ochs Archives/Getty Images)
