If you work at a famous landmark, or even in the immediate vicinity of one, you're pretty much hosed. All you can do is hope that law enforcement and counterterrorism personnel can interdict the terrorists before they strike.
I wouldn't feel particularly safe working at the NYSE between now and the election, but taking a three month vacation isn't an option for most people.
I don't think they can get near the NYSE.
after what happened in iraq today - they should shut down st patricks cathedral on 5th avenue for open public access.