It was the last day of the Smiths' family vacation in Bethel, Maine, two years ago. They planned to go downstairs, have breakfast, check out of the motel and drive home to Maryland. School was to start three days later. Jeff Smith, a pilot for Southwest Airlines who frequently flies to Houston, walked out of the hotel room and realized he had accidentally taken both room keys. His wife and ten-year-old daughter, Mara, were still in the room packing. While he was returning his wife's key, his eight-year-old twins, Tucker and Ellie, ran ahead. Tucker ran downstairs to the lobby and onto the old-fashioned swing-gate elevator beside the front desk. His plan was to ride to the second floor, jump out and surprise his dad. "He liked to race ahead and surprise you," Jeff Smith says. "I was about 30... More >>>