Ron Nmott News Today

Officers. nbcs ron nmott has been trackig the story. he joins us now from brooklyn. >> reporter: there is a real pall hanging over this entire community, especially this street where they died. its added a sense of loss and tragedy to what should have been a week of tradition and celebration. since last weekends ambush killings of two officers, new york city police are stepping up efforts to ensure their safety after a ramp up of threats. officials say one man was overheard on the phone threaten...