Why have tech leaders called for a six-month pause on AI?

Elon Musk and many other tech experts call for a six-month pause on artificial intelligence. They say there needs to be more research into possible risks, but will this happen? And how much of a threat is AI? Join host Cyril Vanier. Guests: Gary Marcus - Emeritus Professor at New York University. Atoosa Kasirzadeh - Director of Research at the University of Edinburgh's Centre for Technomoral Futures. Ramesh Srinivasan - Professor at the University of California.