Hi, we just started our new series of chats with ML practitioners. However, learning about the experience gained by researchers, engineers and entrepreneurs doing real machine learning work can result in a great source of knowledge and inspiration. Please meet Justin Harris, the Senior Software Developer at Microsoft Research who recently published the paper Decentralized & Collaborative AI on Blockchain. Justin is currently using his experience in machine learning and crowdsourcing to implement a framework for ML in smart contracts in order to collect quality data and provide models that are free to use. We asked him why decentralization is important for the future of AI.

How well does Face ID work? We let USA TODAY newsroom staffers test Apple's new facial recognition system. Crowds gather at the Fifth Avenue Apple Store ahead of the iPhone X launch. The iPhone still draws a crowd. A full day before the iPhone X was to go on sale at the Apple Store on New York's Fifth Avenue at 8 a.m.