*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Singer-songwriter Peter Yarrow, from the 1960s folk music trio Peter, Paul and Mary, performs April 28, 2016 at the Vietnam ...

Folk trio Peter, Paul and Mary, from left, Mary Travers, Paul Stookey and Peter Yarrow, perform at a Los Angeles benefit to aid to Cambodian refugees on Jan. 30, 1980.

Singer-songwriter Peter Yarrow, from the 1960s folk music trio Peter, Paul and Mary, performs April 28, 2016 at the Vietnam War Summit at the LBJ Presidential Library in Austin, Texas. LOS ANGELES ...

Singer-songwriter Peter Yarrow, from the 1960s folk music trio Peter, Paul and Mary, performs April 28, 2016 at the Vietnam War Summit at the LBJ Presidential Library in Austin, Texas. LOS ANGELES ...

Peter Yarrow performs at the LBJ Presidential Library in Austin, Texas at a three-day Vietnam War Summit, April 28, 2016.

Singer-songwriter Peter Yarrow, from the 1960s folk music trio Peter, Paul and Mary, performs April 28, 2016 at the Vietnam War Summit at the LBJ Presidential Library in Austin, Texas.

Singer-songwriter Peter Yarrow, from the 1960s folk music trio Peter, Paul and Mary, performs April 28, 2016 at the Vietnam War Summit at the LBJ Presidential Library in Austin, Texas.

FILE – Folk trio Peter, Paul and Mary, from left, Paul Stookey, Mary Travers and Peter Yarrow, appear at the American Music Awards in Los Angeles, Jan. 26, 1987. (AP Photo/Lennox McLendon, File) ...

The singer-songwriter and social activist best known as one-third of the folk-music group Peter, Paul and Mary, has died at age 86. ...

LOS ANGELES — 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 ...

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 ...