https://www.reuters.com/article/us-facebook-cambridgeanalytica-britain-m/uks-may-says-she-hopes-facebook-boss-understands-data-leak-concerns-idUSKBN1H32D5 >British Prime Minister Theresa May said she hoped Facebook Chief Executive Mark Zuckerberg understood why people were concerned about alleged leaks of personal data, but it was up to him to decide whether to face a committee in Britain's parliament.