Dan Wenk, who spent four decades working for the National Park Service, shares his views on the current state of the agency and the National Park System. Host Kurt Repanshek discusses efforts to plan a restoration of the Tidal Basin at the National Mall and Memorial Parks with Katherine Malone-France of the National Trust for Historic Preservation, and Erika Zambello wraps up the show with a visit to Little River Canyon National Preserve in Alabama.