Meta CEO Mark Zuckerberg took the witness stand in a landmark antitrust trial initiated by the FTC, which alleges that Meta created a monopoly by acquiring Instagram and WhatsApp. The trial, which may last up to eight weeks, focuses on whether these acquisitions suppressed competition. FTC attorney Daniel Matheson emphasized internal emails revealing Zuckerberg's concerns about competition, while Meta’s defense argues the acquisitions enhanced the consumer experience. The case could compel Meta to divest Instagram or WhatsApp, significantly impacting its revenue. As the trial unfolds, the outcome may set important precedents for regulating Big Tech.