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Today, my colleague Kate Conger has a dispatch from Silicon Valley, where a debate about the use of facial recognition technology has become another front in the broader fights over technology and privacy:

When San Francisco banned the use of facial recognition by the city’s police and other agencies earlier this year, it was an outlier in the United States. But now several other cities are following suit, and California is considering a limited ban on the technology.

Somerville, a city near Cambridge, Mass., passed a facial recognition ban last week. Oakland, San Francisco’s neighbor across the Bay, is on the verge of passing its own measure, which would prohibit the police and other city agencies from deploying the technology. And a bill in the California State Legislature that would ban the use of facial recognition on footage collected by police body cameras appears to be gaining traction.

The legislative forays indicate a groundswell of support for curtailing the technology, which has struggled to correctly identify women and people of color. The error rates and the pervasive, passive surveillance that facial recognition can enable are often cited as concerns motivating the bans.