putin, but will he confront putin with russia's election meddling. will he offer what they want to settle the relationship? president trump is in poland after his foreign trip angered european leaders on his first visit. how will he handle the crucial summit meetings there? an ambush. a new york city police officer, a mother of three, shot in the head as she sits in a marked vehicle. they call it an assassination. what's behind the deadly ambush. i'm jim sciutto. you're in "the situation room." >> announcer: this is cnn breaking news. breaking news, the united nations security council holds a security session today after north korea's long-range