.@cwarzel and @stuartathompson pieced together some stories from Pasadena, Calif., over a period of several months. Their eye in the sky wasn’t a network of traffic cams or satellites. It was the data spewing from smartphone apps. https://nyti.ms/34OQdSX pic.twitter.com/oTCeiyonRe
4:50 PM - 22 Dec 2019
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