At 11:30 this morning, the emergency sirens at work began to blare. Pre-recorded announcements ordered everybody to evacuate the building without delay. I glanced at the calendar: sure enough, Tuesday. You see, every few months, the company conducts evacuation exercises, and for whatever reason, these always taken place on a Tuesday. The oft-practiced drill (every time, we are told that we have been excellent but that there is still room for improvement) went well, and employees gathered in the designated meeting places. Soon, we were advised that we could go back to work. Many of us did not follow these instructions, however, choosing to go for an early lunch in the company restaurant instead. Nothing whets the appetite like an evacuation drill!