Opinion There's no federal standard on facial recognition. Congress should step in.

AND THEN there were three. Amazon has joined Microsoft and Google in supporting regulation of facial recognition technology, and it is easy to guess why: Research on bias in the software has amplified public skepticism, and legislators are starting to take note by proposing restrictions and even bans. Facial recognition technology could have many beneficial effects. The software could help stop human trafficking, reunify refugee families and make everyday services -- from banking to paying for groceries -- safer and faster. But it could come with costs, too, which is why regulators are right to pay attention.