Data breach: Mark Zuckerberg apology moves none; Facebook stock tumbles

Facebook Inc came under further pressure from lawmakers, investors, advertisers and users on Thursday, the day after Chief Executive Mark Zuckerberg admitted the social media network made mistakes in letting 50 million users' data get into the hands of political consultancy Cambridge Analytica.
 
US lawmakers demanded Zuckerberg personally testify in Washington to explain his company's actions.
 
Meanwhile, advertisers Mozilla and Commerzbank suspended ads on the service and the hashtag #DeleteFacebook remained popular online, although it was hard to tell how many users are abandoning Facebook.
 
In light of those concerns, investors continued to sell off Facebook shares,