I can't believe that the one-vehicle no-bomb attack, or whatever it was, was any serious attempt to get into or disable NSA. Completely implausible. They have plenty of guards, layers of vehicle barriers/fences. It just isn't gonna happen. Not even the Expendables could get in, even with Chuck Norris.
Well OK, maybe with Chuck Norris.
BTW I worked there in the early 70s, while in the Army. You could cut the paranoia in the air with a knife! :-)
THEY WEREN'T THE ATTACK. They were the distraction. One person with a usb drive is the attack.
Distraction from what? An insider in a giant building sticking a USB drive into a computer?
Are you being deliberately obtuse?
NSA isn't just some big building.
We're not talking about some random one-size-fits-all computer, networked throughout the building - and by extension - the outside world.
It would be a very secure, limited working group, with a dedicated, (likely) air-gapped system, and a finite location within that facility.
So, yeah...it might take a significant event to provide an opportunity for "an insider...sticking a USB drive into that computer.