Amazon reveals Alexa glasses

The tech giant takes its Alexa smart assistant out of the home. Plus, are neural interfaces the next big thing in how we control computers? And, the Facebook-backed Libra digital currency has met with opposition from governments. Can the project get back on track? Presented by Rory Cellan-Jones, with BBC tech reporter Chris Fox, and special guest, Caroline Carruthers, business author and data consultant. (Image: Eyeglass frames with voice-activated digital assistant Alexa at Amazon's headquarters in Seattle, Credit: Glenn Chapman/ AFP/ Getty Images).