AFTER TONY HAD FINISHED the door, he swept the entire classroom. He ran the sensor along each row, checked every desk and chair and then, holding his arm up, scanned nothing but air. Ashley asked him if he could pick up the baseball game. Finally he scoured my desk, the sides, crawled underneath, and finally scanned the desktop. After he covered the classroom, he scanned George, Ashley, Sandy, and me. Tony turned to the secretary, “I"ve got it all here, ma"am. We should follow the route through the school.” George led the way. As we entered the gym, Tony asked, “Where was the president in here?” I tried to duplicate the president"s steps and showed where he"d stood signing autographs. Tony scanned the floor, walked to the basket, held the scanner up to trace the arc of the basketball be

