As the US election looms, Donald Trump is pushing his message around stopping what he calls the "migration invasion" of America across the Mexican border. In the Arizona desert, robot dogs, mobile surveillance towers and drones with tasers already make the crossing a living nightmare. Now artificial intelligence is being combined with the collection of people's photographs and biometric data to make what lawyers and human rights experts say are arbitrary and often unchallengeable decisions about a person's right to asylum. Meanwhile a small number of private companies are making a large profit from the sale and use of these systems to governments in America and around the world. 

Guest: Petra Molnar, author “The Walls Have Eyes: Surviving Migration in the Age of Artificial Intelligence,” published by The New Press, and Associate Director, Refugee Law Lab, York University, Toronto.