https://www.reuters.com/article/us-facebook-privacy-testimony/zuckerberg-ditches-t-shirt-apologizes-for-facebook-mistakes-idUSKBN1HG2EY >Facebook Inc Chief Executive Mark Zuckerberg swapped his trademark T-shirt and jeans for a dark suit and a purple tie on Monday as he met U.S. lawmakers to apologize for the social network's misuse of its members' data and to head off possible regulation.