Zuckerberg Vows to Alert All Whose Data May've Been Exposed

Facebook Inc.’s Mark Zuckerberg, breaking a media silence on the latest consumer imbroglio to engulf the social media company, vowed to inform each of his two billion-plus users if there’s a chance their personal data was compromised.

In an interview with CNN, the billionaire chief executive officer said he would appear before Congress if necessary, to testify on revelations that a researcher harvested data on 50 million and sold it on surreptitiously to consultancy Cambridge Analytica. That bombshell has since wiped $45 billion off Facebook’s value, drawn regulatory scrutiny on two continents and ignited a #deletefacebook campaign.