FILE - 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. (AP Photo/George Brich, File)LOS ANGELES (AP) — 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. Peter Yarrow died Tuesday at his home in New York. That’s according to publicist Ken Sunshine. Peter, Paul and Mary rose to overnight fame in 1962 when they blended their voices in stunning harmonies as they sang out against war and social injustice. Among their many hits were Bob Dylan’s “Blowin’ in the Wind,” Pete Seeger’s “If I Had a Hammer” and Yarrow’s own “Puff the Magic Dragon.” After a 1970 breakup they reunited eight years later, continuing their partnership until Mary Travers’ death in 2009.