>> terrorism has evolved. it's always evolving. >> attacks on the city can come from anyone and anywhere. how do you prepare for every possible scenario? >> this is all hands on deck. we have to be as vigilant as possible. >> for us this is the big game. this is the superbowl. >> and the days before their biggest event of the year, an embedding with the country's large he felt police force to find out what it takes to keep new york city safe. ♪ ♪