The Kimball Art Center’s new exhibit, “In the Shadow of the Wall,” which is on display through Aug. 18. features the works of 15 artists, architects and researchers who are inspired by the struggles, tragedies and playfulness of the human spirit found at the United States and Mexico border.Clayton Steward/Park Record The Kimball Art Center will take viewers to the United States and Mexican border to find the stories of people who find themselve…