Cybersecurity

Could hackers take down a city?

Last year, researchers found that traffic monitoring system used in dozens of U.S. cities, including Washington, D.C., could allow a malicious hacker to falsify traffic data and manipulate stop lights. District officials say the city isreviewing the security of its traffic sensors. A few years ago, two Los Angeles traffic engineers pleaded guilty to hacking into the city's traffic system and slowing down traffic at key intersections in support of a labor protest.