Facial Recognition - What's in a Face?

Yenny sees and processes faces in an extraordinary way. But technology is quickly passing her superhuman abilities. Most of us already use facial recognition to unlock our phones and tag people in photos. Governments, law enforcement, and companies can use cameras and algorithms to collect and identify us. Where will we draw the line? Today, what's in a face? Ideas about the promise and peril, and turning the human face into an everyday digital tool for anyone to use.