The U.S. Border Patrol is monitoring millions of American drivers nationwide in a secretive program to identify and detain people whose travel patterns it deems suspicious.

Police in Edmonton, Canada, have started a pilot project using AI-equipped body cameras to detect faces on a "high risk" watch list.

When you unlock a phone, step into view of a security camera or drive past a license plate reader at night, beams of infrared light - invisible to the naked eye — shine onto the unique contours of you...