In recent years, conversations about the US-Mexico border have centered around the border wall. However, according to today’s guest, C.J. Alvarez, the wall is one of many construction projects that have occurred in the border region in the last 30 years. "From the boundary surveys of the 1850s to the ever-expanding fences and highway networks of the twenty-first century, Border Land, Border Water examines the history of the construction projects that have shaped the region where the United States and Mexico meet."