Mark Zuckerberg testifies in social media addiction trial that Meta just wants Instagram to be 'useful'

Meta CEO and Chairman Mark Zuckerberg arrives at Los Angeles Superior Court ahead of the social media trial tasked to determine whether social media giants deliberately designed their platforms to be addictive to children, in Los Angeles, on February 18, 2026. Zuckerberg is scheduled to testify Wednesday. (Photo by Patrick T. Fallon / AFP via Getty Images) (PATRICK T. FALLON via Getty Images)

Mark Zuckerberg took the stand Wednesday in a high-profile jury trial over social media addiction. In an appearance that was described by NBC News as "combative ...