Today three police officers and the security guard got off the elevator, stopped a man, and frisked him for a knife (Officer #1: Do you have a knife? Just make it easier for everyone and tell us. Don't reach for it, just tell us where it is."). They then escorted him out while questioning him about a robbery at a nearby store.
The most alarming part of this incident? The public computers, which had good visual and auditory access to this scene, has about 15 people on them at the time. Not a single one was disturbed by the interaction, or even looked up to see what was happening.