Matt Stroud writes: “Facial recognition is being rolled out in stores, in airports, at border crossings, at Olympic games, and now in an increasing number of cities such as Seattle, Daytona Beach, andSan Diego. Cities in the UK are now experimenting with NeoFace tech specifically. It’s important to know how well these systems work, because cities stand to spend a lot of money on futuristic-seeming technology that might not work at all.” So far there is little evidence, according to Stroud, that it works.