The real work happens in the interior offices, where there is no natural light, and no easy way to listen in. Even an invisible man-fly would have to get inside the building to know what happens here.
A group is gathered. they know they'll be given a new assignment today when they arrive, but they don't know what it is. The American and Austrian at least knew they'd be working with Foreigners. The two Brits didn't even know that much. Whoever is giving the briefing has not yet arrived.
The room is bare and looks like nothing so much as a classroom. A few rows of wooden seats with attached desks, and a blackboard. There isn't even a clock here.