 So we hope to see you all out there. This is often a rough night for the city, with fireworks set off throughout the five boroughs and also gunshots and increased violence. Big events also raise concerns about terrorist activity. There are no known specific threats, but Madry says police are ready. You will see some of the assets, and of course there will be security measures that you won't see. Because of road closures, city officials are urging fireworks watchers to use subways and buses. Brian Mann, NPR News, New York.