There were a lot of scents in the air, but all were faint; the floor’s climate control system was busy pumping warm air out the shattered northern window wall and diluting the concentrations below the level she could track. Still, she identified the scent of strangers lingering in the air. One, a male, was vaguely familiar, but the other, a female, was new to her. There was also the ozone tang of machines like the one that had almost struck her in the elevator shaft. That odor was strong enough to indicate that there might be several of the things; they didn’t have enough individuality for her to tell if there had been only the one or if more might be lurking about. The machine had been small enough to hide effectively.