Big Bend National Park lately has drawn a lot of national attention, and not in a good way. Recently the U.S. Customs and Border Patrol announced that it wanted to build some sort of border wall along all or part of the 118 miles of border the national park shares with Mexico. Is that a good idea? Will it adversely impact the park? Can it even be done?

To discuss those and other questions, our guest today is Bob Krumenaker, whose long Park Service career included a stint as Big Bend's superintendent. Bob also is chair of the Keep Big Bend Wild organization that is pushing to see a large portion of the park designated as official wilderness.