CARMEL, IN. Sky Simpson's father never thought he would see his son shine on the world's stage. Never in my wildest dreams, ever thought that he would be on a world stage for anything," Stephen Simpson said. He recalls when he found out his son would have Down syndrome. "We knew ahead of time that he would have Down Syndrome," he explained. "We knew we needed to change the goals for him. There would be just as many important goals. There were ju…