SHARE THIS VIDEO —
Meet the family working with scientists to fight rare diseases with CRISPR therapy
Terry Horgan, 24, is suffering from a rare form of muscular dystrophy. His brother Richard created a nonprofit called Cure Rare Disease through which he is working with a geneticist at Yale who is spearheading research into a cure through a gene editing technique called CRISPR. TODAY senior international correspondent Keir Simmons reports.