This has led to some striking contrasts. Many American homes are now fitted with a network of low-cost sensors made by companies such as Nest and Ring that give one person with a mobile device real-time situational awareness of their most important places, whereas the average US military base is still defended by large numbers of people either standing watch or staring at rows of video surveillance monitors, stacked up like Hollywood Squares. Similarly, many Americans drive vehicles equipped with sensors that tell them everything that is going on around the vehicle at all times, whereas most
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