The article says that in an earlier test, "the organizers made an exception, however, when early in the drill, an employee said the magnitude of the intrusion h

The article says that in an earlier test, "the organizers made an exception, however, when early in the drill, an employee said the magnitude of the intrusion he was investigating would require him to cancel a vacation that was scheduled to begin the following week. McGeehan pulled the employee aside and explained it was only a drill and then instructed him to keep that information private." I'd hazard a guess that they wouldn't keep you there if you had something important going on, but I can see the issue if it becomes a regular occurrence. Employees would be complacent and potentially always play the "vacation" card at some point to test to see if it was real or not.