Associated Press OMAHA, Neb. — Thirteen years after he was injured in a tornado that killed four boys at a Boy Scout camp in western Iowa, Kevin Hanna graduated from medical school. Hanna said the time he spent in rehabilitation after breaking his pelvis when the storm struck the Little Sioux Scout Ranch prompted him to choose a career in medicine. He graduated from the University of Nebraska Medical Center on Saturday and plans to continue his training with a residency in urology at the Mayo Clinic in Rochester, Minnesota. Hanna, 26, was at the Boy Scout camp northeast of Tekamah, Nebraska, when the tornado struck on June 11, 2008. He remembers everything swirling around before he lost consciousness.