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Selina Wang, a tech reporter for Bloomberg News, says that Twitter could still do more to stop Russian and Ukrainian spam accounts from spreading misinformation on the platform. Also: people on social media keep blaming “Sam Hyde’’ for mass shootings, even though he's innocent, and we finally find out why; Facebook saves a dying mill town in the Pacific Northwest; Uber meets its match in Lebanon; a robot becomes a Saudi citizen; and a couple of amateur astro-explorers plan a trip to Mars. Image: Colin Stretch, general counsel at Facebook, Sean Edgett, acting general counsel at Twitter, and Richard Salgado, director of law enforcement and information security at Google, testify before Congress on October 31, 2017 in Washington, DC. Credit: Drew Angerer/Getty Images