Boundary Dispute

Professors Instructions:
“…if one state wants to limit immigration, while the other does not, a dispute may arise.” There are countless examples of this around the world today, not least of which is what is happening just south of Tucson. Briefly describe one situation that falls under this heading in the world today (or choose another type of dispute if you want), making sure you articulate the position of each state. How are these states navigating the border conflict you have selected? What internal or exterior forces are there to help mediate or reduce these conflicts?