Policy Executives at Facebook, YouTube, and Twitter to Testify at Senate Hearing on Algorithms Share Filed to:alexandra veitch Photo: Chip Somodevilla, Getty Images To sign up for our daily newsletter covering the latest news, features and reviews, head HERE. For a running feed of all our stories, follow us on Twitter HERE. Or you can bookmark the Gizmodo Australia homepage to visit whenever you need a news fix. Next week, policy executives from Facebook, YouTube, and Twitter will testify at a Senate Judiciary hearing on algorithmic amplification, Politico reports. Social media recommendation algorithms have come under increasing scrutiny in recent years, and Democratic lawmakers have voiced concerns about how they can fuel extremism and the spread of misinformation online.