Zuckerberg survives unruffled after two days before US Congress

WASHINGTON, DC - APRIL 11: Facebook co-founder, Chairman and CEO Mark Zuckerberg testifies before the House Energy and Commerce Committee in the Rayburn House Office Building on Capitol Hill April 11, 2018 in Washington, DC. This is the second day of testimony before Congress by Zuckerberg, 33, after it was reported that 87 million Facebook users had their personal information harvested by Cambridge Analytica, a British political consulting firm linked to the Trump campaign. Chip Somodevilla/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

Mark Zuckerberg emerged mostly unruffled after two gruelling days of congressional hearings, reassuring investors with his composure even as lawmakers scoffed at his apologies over failures to protect user privacy and his assurances to do better. 

Sitting alone at a witness table before senators on Tuesday and House members on Wednesday, the co-founder of Facebook Inc stuck closely to his intended theme that the world’s largest social network didn’t do enough to prevent its tools from being used for harm and to his mea culpa: “It was my mistake and I’m sorry.”