LOS ANGELES (AP) — Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary, the folk-music trio whose impassioned harmonies transfixed millions as they lifted their voices in favor of civil rights and against war, has died. He was 86. Yarrow, who also co-wrote the group's most enduring song, “Puff the Magic Dragon,” died Tuesday in New York, publicist Ken Sunshine said. Yarrow had been battling bladder cancer for the past four years. American Folk musician Peter Yarrow plays acoustic guitar as he performs, during the Vietnam Peace Commemoration Committee's October 2017 Conference, at the Western Presbyterian Church, Washington DC, October 21, 2017. The Conference, titled 'From Protest to Resistance,' marked the 50th anniversary of the March on the Pentagon. (Photo by Howard Ruffner/Getty Images) During an incredible run of success spanning the 1960s, Yarrow, Noel Paul Stookey and Mary Travers released six Billboard Top 10 singles, two No. 1 albums and won five Grammys. They also brought early exposure to Bob Dylan by turning two of his songs, “Don't Think Twice, It's All Right” and “Blowin' in the Wind,” into Billboard Top 10 hits as they helped lead an American renaissance in folk music. They performed “Blowin’ in the Wind” at the 1963 March on Washington at which the Rev. Martin Luther King Jr. delivered his famous “I Have a Dream” speech. After an eight-year hiatus to pursue solo careers, the trio reunited in 1978 for a “Survival Sunday,” an anti-nuclear-power concert that Yarrow had organized in Los Angeles. They would remain together until Travers' death in 2009. Upon her passing, Yarrow and Stookey continued to perform both separately and together.