An anti-war voice has fallen silent, for Mary Travers, a founding member of Peter, Paul and Mary, was felled by cancer today. The singer, whose sullen folksy sound many of you will remember from "Blowin' in the Wind," was 72.

Like so many of her aural generation — for example, Bob Dylan — Travers got her start in the Greenwich Village cafe scene and, like Dylan, too, her politically-charged lyrics helped propel her to international fame. In honor of Travers and her message, here's another one of her and her band's most beloved songs: "Puff, the Magic Dragon."

Feel free to sing along, man.