US lawmakers are deciding whether to act against the country’s powerful tech giants. Some believe the likes of Facebook, Amazon, Google and Apple are stifling competition. The companies have made huge profits during the Covid crisis and critics believe they will use this cash to buy competitors. With Charmaine Cozier. Clockwise from top left: Facebook CEO Mark Zuckerberg, Google CEO Sundar Pichai, Amazon CEO Jeff Bezos, Apple CEO Tim Cook. Getty Images