TO THE BEST OF OUR KNOWLEDGE PROGRAM RUNDOWN: "National Parks" 0:00 - 21:09 SEGMENT 1: (21:10) William Cronin directs the University of Wisconsin's Center for Culture, History and the Environment. He tells Steve Paulson that national parks intended for the masses are a 19th century invention and a distinctly American one. Also, the early national parks were patrolled and protected by the American Cavalry Ken Burns explains their role in a brief excerpt from his latest PBS series, then, independent producer James Mills follows up on Ken Burns' remarks about the Buffalo Soldiers and looks into the issue of why so few African-Americans visit the national Parks today. Segment One Outcue: "...PRI - Public Radio International." 21:10 - 21:39 LOCAL OPTION with music bed (:29) 21:40 - 31:32 SEGMENT 2: (9:54) Journalist Mark Dowie is the author of "Conservation Refugees: The Hundred Year Conflict Between Global Conservation and Native Peoples." Dowie tells Steve Paulson about a recent confrontation between a Masai leader and several thousand environmentalists gathered for a conference. He also provides examples of conservation projects involving native peoples that actually work. Segment Two Outcue: "...PRI - Public Radio International." 31:33 - 32:02 LOCAL OPTION with music bed (:29) 32:03 - 53:00 SEGMENT 3: (20:57) Anthropologist and naturalist Richard Nelson lives in Alaska and is the host of a public radio program called "Encounters." Nelson hikes through the Alaskan wilderness recording sounds you can't hear anywhere else, and he plays excerpt during this conversation with Anne Strainchamps. There's a link to his radio show at ttbook.org. Also, Nevada Barr has written 15 mystery novels featuring Park Ranger Anna Pigeon. She tells Jim Fleming that despite Anna's fictional adventures, the National Parks are safe places, and wildly different from each other. Barr's latest book is "13 1/2" Segment Three Outcue: PRI Audio Logo For a copy of this hour, call 1-800-747-7444, and ask for program number 9-27-A. copyright 2009 WHA Radio and the Board of Regents of the University of Wisconsin System. All rights reserved.