Peter Yarrow is best known for his work with Peter ... You can honor him and all those who have been killed by guns by saying, ‘That's not OK. It isn't OK to be suffering like this.

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.

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.

(AP) — The plunging polar vortex is bringing subfreezing temperatures to some of the southernmost points of the U.S. A forming storm system is threatening to dump snow on parts of Texas and Oklahoma .