Improvisation: Sonny Rollins & the High Zero Festival

Tonight on the Front Porch, we're winging it! Sonny Rollins is one of the all-time jazz greats, and at 76, his ability to improvise still astounds audiences. He performed at Dartmouth College this weekend. We'll review his show and his career with New York Times music critic Ben Ratliff.

Later in the show, Producer Lawrence Lanahan will take us inside High Zero, Baltimore's annual free improv festival. This story comes to us from the Public Radio Exchange.