Mark Zuckerberg is willing to testify to Congress, isn’t sure if the Russians have your data. And, he’s sorry.March 21, 2018 by quixnet Mark Zuckerberg is willing to testify to Congress, isn’t sure if the Russians have your data. And, he’s sorry.USA TODAYThe Latest: Cambridge Analytica whistleblower regrets workWashington PostRevealed: 50 million Facebook profiles harvested for Cambridge Analytica in major data breachThe GuardianFull coverage