McCOOK, Neb. — A new photography exhibit opening at ArtBank is turning a lens toward a familiar, yet often overlooked, reality of life across the Great Plains: the quiet transformation of the American small town. Photographer Roger Bruhn is in McCook this week for the debut of “Welcome to Our Town,” a collection of black-and-white images that capture the landscapes left behind when communities lose their schools, businesses, and momentum. While Bruhn’s work primarily focuses