My son and I were talking about the GREAT WALL of Canada as we call it. Where we backpack into the Canadian side of the Cascades, you can still see the vestiges of the line they USED to keep clear for the Border. When we thought of them building a wall up through there, we just cracked up, as this one valley alone would be a MONUMENTAL construction deal, let alone a 1,000 miles of mountains and passes. This ain't Texas......