welcome back. new research offering hope to the many folks, millions of those suffering with diabetes. huge medical story here. two new studies show surgery can reverse and even possibly cure the disease. abc s dr. richard besser reports on this big advance. reporter: just 72 hours after weight loss surgery, randy cardy hasn t lost a pound. but his diabetes is gone. your days of medication for diabetes are over for the rest of your life. outstanding. reporter: he and his wife will no longer worry about the possible consequences of long-term type 2 diabetes, blindness, amputation, kidney failure. that s why the two studies are so exciting. this surgery may reverse this condition almost instantly. how quickly might they come