U.S.-Mexico Border Wall Prototypes Remind Expert Of Border Walls Worldwide
Six companies have built eight prototypes for a border wall near San Diego.
The wall was, of course, one of President Donald Trump’s signature pledges on the campaign trail.
Reece Jones has studied border walls.
He’s a professor of geography at the University of Hawaii and author of the book, "Violent Borders: Refugees and the Right to Move."