They are among 240 million people worldwide who have diabetes mellitus Type-2. And 90% of sufferers are obese. It's conventionally managed with an insulin-controlling drug, exercise and diet, which slows down, but doesn't cure the disease. Now, surgeons the world over report that a gastric bypass procedure - meant to treat obesity by making the stomach smaller and bypassing parts of the bowel - cures type-2 diabetes. Carte Blanche Medical investigates a phenomenal medical development in a disease previously considered incurable.