http://www.washingtonpost.com/blogs/the-switch/wp/2018/03/18/u-s-and-british-lawmakers-demand-answers-from-facebook-chief-executive-mark-zuckerberg/

Lawmakers in the United States and Britain are calling on Facebook chief executive Mark Zuckerberg to explain how the names, preferences and other information from tens of millions of users ended up in the hands of a data analysis firm connected with President Trump's 2016 campaign.

The demands came in response to news reports Saturday about how the firm, Cambridge Analytica, used a feature once available to Facebook app developers to collect information on 270,000 people and, in the process, gain access to data on tens of millions of their Facebook “friends” — few, if any, of whom had given explicit permission for this sharing.