minister to visit iran's u.n. ambassador in a hospital in new york. the visa issued limited him to only a few blocks on the east side of manhattan. the state department said zarif could only visit the ambassador if iran released one of the five u.s. citizens currently being detain in the iran. >> martha, thank you. still ahead tonight, news about the new "joker" movie. the fbi tonight, the lapd among those taking action this evening. also ahead, the deputy shot from behind and killed. during a traffic stop and what the sheriff is saying about this just tonight. health news this evening about alcohol and dementia. and the amount of alcohol that brings benefits they say and how much is too much. . then the alarming image today. the elk on the attack outside of a visitors' center. charging at tourists, knocking them to the ground. how it all happened. a lot more news ahead on a friday night. i'll be right back.