Traffic cameras and mobile data are being used to map city pollution in real time, giving cities a powerful new tool to track ...

These camera systems have created a mass location tracking infrastructure knitted together by artificial intelligence.

Police across the country—not just locally—can access the data these cameras collect. Privacy advocates are concerned.

Lee Schmidt, a retired veteran, wanted to know more about the license plate cameras tracking him in Norfolk, Virginia, where he lives. Subscribe to read this story ad-free Get unlimited access to ...