How close is artificial intelligence to building a catastrophic bioweapon or causing other superhuman damage? WSJ's Sam Schechner reports on the team at Anthropic testing for AI dangers. And the team leader, Logan Graham, explains how the tests work. 

The Pacific Palisades neighborhood of Los Angeles has been decimated by some of the worst fires in U.S. history. On Friday, WSJ’s Katherine Sayre accompanied two residents who went back to see what is left of their homes.

Today, the U.S. Supreme Court heard arguments challenging the federal law that requires TikTok, which is owned by Chinese company ByteDance, to either shut down or find a new owner. WSJ’s Jess Bravin breaks down the arguments from each side.