Five social media CEOs were sworn in on Wednesday for what could have been the most eventful children's online safety hearing yet. The Senate subpoenaed recently appointed X CEO Linda Yaccarino, Discord's Jason Citron and Snap's Evan Spiegel to appear before the Senate Judiciary Committee, but Meta founder Mark Zuckerberg and TikTok's Shou Chew agreed to appear without the threat of legal consequence.