A food street vendor wears a scuba mask to protect himself from tear gas as protesters clashed with Turkish police in central Ankara, June 11, 2013. Credit: Marco Longari/AFP/Getty Images
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The most compelling images from the week's news, April 16-22, 2016. In this photo, Maria Victoria, 89, is comforted by her daughter Mariana in Estancia Las Palmas, Ecuador, Tuesday, April 19, 2016.
Facial recognition systems are getting better, but can still return errors. False positives match a face when no match should exist, such as when a person's image isn't in the database.
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