After I no longer went on family road trips with my parents, it became a rare occasion to visit my grandparents who lived hundreds of miles away from us. So one year, I decided to fly to visit them in the small town of Land O’Lakes, Wisconsin, for a long weekend. As we drove to the airport for my return flight, Grandma, who had never flown, began to express her fears to me: “That was such a small plane you flew on . . . . There’s nothing really holding you up there, is there? . . . I would be…