Elon Musk is leading a group of investors in an unsolicited $97.4 billion bid to take control of OpenAI, escalating his rivalry with CEO Sam Altman who has gained influence in the Trump administration on AI policy (NYT). American climber Alex Honnold completed a 90-minute free-solo ascent of the 508-meter Taipei 101 skyscraper in Taiwan (multiple sources).

Robert F. Kennedy Jr. announced a new vaccine policy requiring doctor consultations for six routine shots (multiple sources). A labor dispute has shut down a Colorado ski town, while California dropped its lawsuit over a $4 billion federal funding cut for high-speed rail.