The city of Texarkana sits squarely on the state border between Texas and Arkansas. The city of 70,000 inhabitants has two mayors, two city councils, and two police and fire departments. The cross-town sporting rivalry between high schools draws an uncommonly high attendance, reflecting the deep allegiance each has to their own state’s school. More significant challenges arise as well, such as disputes over the shared water system, governed by two sets of state laws. Yet the town is known for its unity despite the line that divides it. Residents gather annually for a dinner held on State Line Avenue…