Facebook's Moments app uses facial recognition technology to group photos based on the friends who are in them. Amid privacy concerns in Europe and Canada, the versions launched in those regions excluded the facial recognition feature. Facebook hide caption

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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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A Look Into Facebook's Potential To Recognize Anybody's Face

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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

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