Security forces blocked all the entrances to the building with heavy equipment and went to a maximum alert.
Good sound defensive moves. But it would have been far better to have grabbed these people and gotten them to the police for interrogation.
My advice: arm security. Apprehend suspicious-looking or oddly behaving people in the vicinity of vital buildings like this. We are in just as much trouble, or more, than we were in WWII. Let's start acting like it.
Local security people, local police:
Please stop pussy-footing around. Stop being politically correct. Start arresting and holding people who look like they need it.
The number of terrorists who have been stopped and released, even after producing suspicious ID, is appalling. A week later, when the FBI realizes who they were, is too late!
The security guards in this situation should shoot first, and get a live prisoer if at all possible!
We won't get serious until we do have another 9-11 level event.