While biometric technologies have been around for a long time, we’re now starting to see them in our day-to-day lives. From iris and fingerprint scans to facial recognition software, Lee Kair, managing director at The Chertoff Group, breaks down what we need to know about biometrics. Kair, an expert in aviation and transportation security, chats about how biometrics can be used to speed up travel processes while making them more secure. He argues that transparency will be critical as we balance the appropriate use of biometrics with privacy concerns.