https://www.theguardian.com/technology/2018/apr/13/facebook-founder-congress-privacy-issues-zuckerberg

Facebook founder was lost for words as representatives asked questions about user tracking

As Mark Zuckerberg left Congress on Tuesday after testifying to the Senate, he may have felt relieved. The four-hour Q&A session had been largely dominated by mundane questions of fact about how Facebook works, requests for apologies and updates he had already given and was happy to repeat, and shameless begs for the social network’s cash pile to be used to expand broadband access in senators’ home states.