Post collecting hundreds of hours of interviews and over a million documents about Amazon, Apple, Facebook, and Google, lawmakers finally got a chance on Wednesday to grill the CEOs of Big Tech over their dominance and allegations of monopolistic practices that stifle competition. However, currently, it's unclear how much they advanced their goal of bringing some of the world’s largest companies to heel. Invective flew as legislators questioned Facebook’s Mark Zuckerberg, Amazon’s Jeff Bezos, Sundar Pichai of Google, and Tim Cook of Apple at a hearing of the House Judiciary subcommittee on antitrust. For the last year, that panel has probed the business practices of the Silicon Valley giants with an eye to determining if they need to be regulated more heavily, or even broken up . In nearly five hours of testimony and questioning, however, there were few startling revelations or striking confrontations. While the executives faced hostile questioning and frequent interruptions fro