https://www.reuters.com/article/us-facebook-lawmakers-cicilline/facebooks-zuckerberg-pledges-cooperation-with-u-s-antitrust-probe-congressman-idUSKBN1W521O >Congressman David Cicilline, chair of the U.S. House Judiciary Committee's antitrust panel, said on Friday that Facebook Chief Executive Mark Zuckerberg pledged cooperation with the panel's probe into online markets during a meeting on Capitol Hill.