U.S. Senate Judiciary Committee holds hearing to discuss allegations from Twitter whistleblower Zatko on Capitol Hill in Washington By Sheila Dang and David Shepardson (Reuters) -The FBI informed Twitter Inc of at least one Chinese agent working at the company, U.S. Senator Chuck Grassley said during a Senate hearing on Tuesday where a whistleblower testified, raising new concerns about foreign meddling at the influential social media platform. U.S. Senate Judiciary Committee holds hearing to discuss allegations from Twitter whistleblower Zatko on Capitol Hill in Washington Peiter “Mudge” Zatko, a famed hacker who served as Twitter’s head of security until his...