Losing more than 13% by close today after the company reported thursday revenue fell for the first quarter. trace, back to you. >> trace: lydia hu in new york tonight. lydia, thank you. ♪ >> trace: well, this evening we look at the worse case scenario for artificial intelligence. some in congress want to take steps to make sure ai cannot launch nuclear weapons against its human creators. here is congressional correspondent aishah hasnie. >> ai is amazes. it's going to help society in many different ways. it can also kill us. >> democrat representative ted lu wants to prevent artificial intel...