What if Mark Zuckerberg had not bought Instagram & WhatsApp?

No one knew how these deals would turn out. But hindsight, it seems, is 20/20. On Monday, the government argued in a landmark antitrust trial that both acquisitions - now considered among the greatest in Silicon Valley history - were the actions of a monopolist guarding his turf. Zuckerberg, who was called as the first witness in the trial, has previously denied that buying Instagram and WhatsApp hurt competition.