Now Carla just had to wait for her distraction to hit. When it did, the building’s security would get much tighter; the guards would immediately ensure that all visitors safely exited the Byte of the Future display. They’d be sure to retrieve a visitor pass from each person as he or she left the area, and to compare the number of passes collected with the number of visitors who entered the building that day. Assuming that none of the visitors actually did go missing when the spirit crashed the exhibit’s computers, all of today’s visitors would be carefully accounted for—probably within a matter of a few minutes. And by the time they were, Carla would be well on her way to the research lab.