Border Patrol using technology to ‘wall’ off Canadian border

Technology has largely taken the place of a physical wall on the U.S.-Canada border, where federal law enforcement officials depend on digital systems and electronic devices to multiply their presence.

The northern border is the longest in the world, though none of it has a wall like the U.S.-Mexico border barrier.

At a time when the White House is pushing Congress to pass tens of billions of dollars in funding for more wall at the southern border, federal police up north say the investments in tech have proven themselves and should be strengthened...