drugs. tough, new auto emission standards about to be announced, but will they push more americans to go electric a big upside of artificial intelligence, detecting cancer much earlier, and predicting when it might strike and the young, bold athletes sharing their culture and superstar tony hawk. announcer: this is nbc nightly news with lester holt welcome. once again, in the tragic aftermath of a mass shooting, we re getting a person look at pol risking their own lives to stop an active shooter late this afternoon, louisville police releasing body cam video of officers rushing to a downtown bank yesterday, immediately coming under fire from a bank employee he was armed with an ar-15 assault-style rifle, carrying out a murderous rampage, fatally shooting five people the gunman killed by police tonight one of those officers, who rushed to stop the gunman, a rookie, just days on the streets, remains in critical condition, and tonight there is a deeper understanding
ukraine and the former vice president said i have never spoken to my son about his overseas dealing, they said it emphatically. your reaction? i am incredulous, you would be unaware his son was making a million-dollar fear from ukrainian gas company. he was under investigation by the ukraine, a company he was the point person for the obama administration. i want your opinion about something to talk about today in california, the fight between lawmakers in california, the trump administration, auto emission standards, trying to revoke state authority in setting standards for cars and in colorado, connecticut, these attorney general s in the states have a legitimate right to be
divers even searching a pond, but turning up nothing. and late today, the family saying they have no idea who could have taken her. it could be anyone, even if it s a family member, stranger. but the only thing we re asking is for her to come back home safely. reporter: tonight, police are looking for that red van with tinted windows and a sliding door on the passenger side. david? whit johnson reporting tonight. thank you, whit. next this evening, president trump in a new feud with california tonight, telling that state it cannot set its own emissions standards, revoking that state s right to set its own limits for cars and trucks. california s governor calling it a political vendetta and he s vowing to fight back tonight. abc s matt gutman from california. reporter: tonight, president trump in california, picking what could be a long legal fight with this tweet the trump administration is revoking california s federal waiver on emissions. barring california from setting
his donors. threaten to attack cities there saying we can t let los angeles destroy themselves by allowing what s happening. there are policemen who are getting sick. they are actually sick. they are going to the hospital here and we let that happen. and earlier today, to set its own auto emission standards. let me begin with you. auto emission standards. i would think that most conservatives would say that s a states rights issues. emily: i think part of his arguments, which i firmly support, the ability now for the market to set prices rather than the state to do it in kind of this manufactured way. if i can speak for a second to on his disagreement with those liberal leaders he s exactly exactly right. there was a letter that governors send to trump on behalf of most of the mayors.