https://www.reuters.com/article/us-facebook-cambridge-analytica-britain/zuckerbergs-snub-of-uk-parliament-astonishing-says-lawmaker-idUSKBN1H31QD >Facebook CEO Mark Zuckerberg's decision not to answer questions from British lawmakers about a scandal over the firm's data is "astonishing", the parliamentary committee chief who invited him to attend said on Tuesday.