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A secretive start-up promising the next generation of facial recognition software has compiled a database of images far bigger than anything ever constructed by the United States government: over three billion, it says. Is this technology a breakthrough for law enforcement \u2014 or the end of privacy as we know it?\n\nGuest: Annie Brown, a producer on \u201cThe Daily,\u201d spoke with Kashmir Hill, a technology reporter for The New York Times. For more information on today\u2019s episode, visit nytimes.com/thedaily.\xa0\n\nBackground reading:\xa0Federal and state law enforcement officers are using one company\u2019s app to make arrests in 49 states. So what is Clearview AI, and what influence does it hold?Clearview\u2019s app is being used by police to identify victims of child sexual abuse. Some question both the ethics and the accuracy of the results.