Kashmir Hill uncovers the secret history of Clearview AI, a mysterious start-up selling an app that can identify you using just a blurry photo of your face. The app can find your name, your social media profiles, your friends and family. Launched by a computer engineer and a US politician, and assisted by a cast of controversial characters with connections to the alt-right, this app would have society-altering potential. A thrilling account of the tech start-up selling radical new form of facial recognition.