Video from BBC News: Glacier melt changes Italian border. I can’t embed it, so you will have to go to the link.
This reflects a different view of borders than what we have in the United States. In the US, if a river that marks a boundary changes course (e.g. the Mississippi), then the border stays where it was. In Europe, it seems that if a glacier melts, then the international border can move 100 meters or so.
Grace and Peace