our offices here are doing a great job to keep us secure. reporter: the 2 million spectators for the ball drop will enter through a dozen entry points with multiple layers of security. magn magnetometers, wands, and bag inspections will once again be the price of entry. everyone wants to be here be on tv. reporter: cement barricades, trucks fill wed with sand and blocker vehicles are now part of the tradition. this year, the square s high-rise buildings, the backdrop for its neon glitz will have spotters and snipers after new york s massacre in las vegas. detectives are assigned to each hotel here and working with their security squads. and you will see more k-9 units, specially trained vapor-sniffing dogs able to detect explosives, even under many layers of winter clothes. yet for all the reminders of potential trouble, some are focused on the spirit of the night. it brings a lot of people together. and i think just that, that unity, really it brings a match to this place, y