In March 1965, Dylan released his fifth album "Bringing It All Back Home". Side one features him backed by an electric band, while side two features him accompanying himself on acoustic guitar. On July 20, 1965, he released his single "Like a Rolling Stone" featuring a rock sound. On July 25, 1965, he performed his first electric concert at the Newport Folk Festival, joined by guitarist Mike Bloomfield and Barry Goldberg of the Paul Butterfield Blues Band. Some sections of the audience booed the performance, leading members of the folk movement to criticize him for moving away from political songwriting and for performing with an electric band, including Irwin Silber and Ewan MacColl. Dylan continued his trend towards electric rock music on his next two albums, "Highway 61 Revisited" (August, 1965) and "Blonde on Blonde" (June, 1966).