Medtronic says it will spend more than three and a half BILLION dollars to get into the diabetes (die-ah-BEE-tees) treatment business. The Fridley-based medical device giant is buying "MiniMed, Incorporated," a maker of insulin pumps and glucose monitors AND the much smaller -- "Medical Research Group," which is developing an implantable insulin system. Medtronic says with the two Los Angeles-based companies it can begin serving the enormous and rapidly-growing diabetes market. Minnesota Public Radio's Mark Zdechlik reports...