Tech platforms criticized by lawmakers on the Hill in a day of scathing testimony

Executives from Facebook, Google, Apple and Amazon defended their dominant positions in the tech ecosystem on Tuesday as Congress dug deeper into their business models looking for unfair business practices.The executives from the major tech platforms were on Capitol Hill to discuss their market power before a House subcommittee. Congress and regulators have been investigating the companies on a host of issues related to everything from privacy policies and data collection to monopolistic behavio