FILE - In this April 11, 2018 file photo, Facebook CEO Mark Zuckerberg arrives to testify before a House Energy and Commerce hearing on Capitol Hill in Washington, about the use of Facebook data to target American voters in the 2016 election and data privacy. For a company bent on making the world more open, Facebook has long been secretive and reluctant to talk about security issues. Yet on Tuesday, July 31 it rushed forward to alert Congress and the media that it had recently detected a small but telling case of election manipulation. While this signals a new openness for the company, there is plenty that Facebook still isn’t saying, and experts wonder whether it’s mere window dressing or a true culture shift. (AP Photo/Andrew Harnik, File)