https://www.reuters.com/article/us-facebook-cambridgeanalytica-britain/zuckerberg-will-not-answer-uk-lawmakers-questions-over-data-scandal-idUSKBN1H3121 >Facebook boss Mark Zuckerberg will not answer questions from British lawmakers over how millions of users' data got into the hands of political consultancy Cambridge Analytica, according to a letter sent by the social network seen by Reuters.