https://www.cnbc.com/2018/04/08/zuckerberg-gets-a-crash-course-in-charm-will-congress-care.html

For Facebook, Tuesday is being seen as a kind of dreaded final exam.

That's when Mark Zuckerberg, the company's chief executive, will swap out his trademark gray T-shirts for a suit and tie, and embark on a two-day marathon of testimony on Capitol Hill. His goal? To apologize for Facebook's missteps, reassure Congress that Facebook intends to stop foreign powers from using its service to meddle in American elections and detail the company's plans to better protect its users' privacy.