Mark Zuckerberg, Facebook CEO, will be answering questions in the U.S. Senate. Senators and other officials for instance from the White House will have the opportunity to ask specific questions about Facebook and its policy on privacy and user monitoring and interrogate Zuckerberg on those and other topics. He will be receiving some hard questions on these and about recent events in connection with Facebook and Instagram.
The concentration of users at Facebook and other services owned by the company, such as Instagram, Oculus and other corporations. This high concentration of users gives Facebook the chance to collect and assess huge amounts of data and to censure its users by employing thousands of people just for administration and content review purposes.