'Fresh Air' at 20: New Orleans' Dr. John

Fresh Air went national in 1987, and we're celebrating that 20th anniversary by revisiting some classic broadcasts. In this segment: novelist and blues record producer Sam Charters. In the 1950s, Charters traveled the South, making field recordings of neglected and previously unknown musicians and singers. He's a Grammy Award winner, and his latest books are last year's New Orleans: Playing a Jazz Chorus and Walking a Blues Road: A Selection of Blues Writing, 1956-2004, published in 2004. Rebroadcast from July 3, 1987.

Fresh Air went national in 1987, and we're celebrating that 20th anniversary by revisiting some classic broadcasts. In this segment: Anthropologist Robert Murphy. In 1972, his body began to twinge with muscle spasms that wouldn't go away; doctors discovered a debilitating tumor growing on his spinal cord.

Fresh Air went national in 1987, and we're celebrating that 20th anniversary by revisiting some classic broadcasts. In this segment: Novelist Richard Price. His gritty urban style is evident in bestsellers like Clockers, Freedomland and Samaritan. Price is also a screenwriter, with credits including adaptations The Color of Money, Mad Dog and Glory, and The Wire, HBO's award-winning series. Recorded in 1985, when Fresh Air was a local daily radio show in Philadelphia.