In the parking lot, I stay out of sight, watching the glow of cigarettes from the stream of people stepping out for a smoke break. Finally I spot a little pack of five or six people starting back into the building together. The rear entrance door is one of those that unlock when an employee holds his or her access card up to the card reader. As the group single-files through the door, I fall in at the back of the line. The guy ahead of me reaches the door, notices there’s someone behind him, takes a quick glance to make sure I’m wearing a company badge, and holds the door open for me. I nod a thanks.