Arizona

Our guest is Tom Clavin, the popular historian whose latest book, "Dodge City: Wyatt Earp, Bat Masterson, and the Wickedest Town in the American West," is just out in paperback. As was noted of this book by the Houston Press: "Thorough, compelling, and entertaining.... Clavin sprinkles in fascinating tidbits about life and culture in the Old West.... In 'Dodge City,' Clavin vividly re-creates a time, a town, and an era that it seems incomprehensible occurred less than 150 years ago.

Our guest is the celebrated photographer David Halpern, who was based for many years here in Tulsa and now resides in Santa Fe. A wonderful exhibition of his work -- "The Essence of Place: Celebrating the Photography of David Halpern" -- will be on view at the Gilcrease Museum through the end of this year.

Lots of talk these days, as we all know, about "building that wall." But what about the borderwall that already exists between much of the U.S. and Mexico? And what about the cultures, events, art works, communities, and lives that are associated with this borderwall -- that is, with the various walls and fences running between these two countries? Our guest is Ronald Rael, an Associate Professor in the Departments of Architecture and Art Practice at the University of California, Berkeley.