I have to put up with your kind at headquarters.

What did the staff at headquarters think the rest of them were doing?

He had become a figure known to every one at headquarters.

Security at the system's headquarters is strong, several workers said.

I understand you met each other down at police headquarters.

In a week they won't even speak your name at Headquarters.

He's been at headquarters most of the time, but who will ever know that?

Therefore, the place to look for him was at headquarters.

But there isn't a man at headquarters who could do half what you have done.

Out there at headquarters he had free will, a chance to think things over.