Researchers found that passport screeners have an error rate of about 15 percent when they're evaluating whether faces match passport photos. Justin Sullivan/Getty Images hide caption

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Social media companies like Facebook won't talk about who can access face-tagging data. That silence is a problem, privacy advocates say. iStockPhoto.com hide caption

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Hey, isn't that ...? New facial recognition software is designed to help store employees recognize celebrities like Mindy Kaling — and other bold-faced names. Chelsea Lauren/Getty Images hide caption

itoggle caption Chelsea Lauren/Getty Images