In 1986, the San Diego Border Patrol sector accounted for approximately one-third of all apprehensions along the U.S.-Mexico border. Today, it accounts for only a small fraction.

How did the region go from one of the busiest sectors for illegal border crossings to one of the most secure? In our latest edition of “Underreported,” The Daily Signal visits the U.S.-Mexico border in San Diego to find out.

(For more from the author of “Underreported: How Building a Border Wall Changed San Diego” please click HERE)