'They have too much power': US lawmakers grill Big Tech as Trump weighs in

Much-anticipated congressional hearing featuring the CEOs of four of America's largest tech firms kicks off.

A much-anticipated congressional hearing featuring the CEOs of four of America's largest tech firms kicked off on Wednesday afternoon in a confrontation that promises a healthy dose of political theatre, while also offering a window into the thinking of lawmakers trying to rein in Big Tech.

Facebook Inc's Mark Zuckerberg, Amazon.com Inc's Jeff Bezos, Alphabet Inc-owned Google's Sundar Pichai and Apple Inc's Tim Cook--who together represent about $5 trillion of the U.S. economy--are appearing via videoconference before the House Judiciary Committee's antitrust panel.

President Donald Trump, who has clashed with several of the biggest tech companies, on Wednesday threatened to take action