At the end of the day, the plants had to be stored in a secure building.
It was a secure building, so it had to be someone in the building.
You are now within the atrium of the most secure building in the Western World.
They were running toward the armory, supposedly the most secure building in the camp.
I wasn't kidding about her being in a secure building.
Since that date there have been no reported criminal activities and the car park has gained the reputation of a highly secure building.
They are housed in a secure building with environmental control.
Surely we have some secure building to hold them in.
A sufficiently secure building has not yet been found to house the tribunal.
No one knew what was going on but everyone had decided to take shelter in the most secure building available.