In Minnesota's tobacco trial, the state today began building its case that smokers increase health care costs. The state and Blue Cross Blue Shield are seeking nearly 2-billion dollars to cover the cost of treating smoking-related illnesses over the past two decades. Minnesota Public Radio's Laura McCallum reports.. Cancer expert Jon Samet testified today that smoking causes more than a dozen diseases, and those diseases result in higher health care costs. The Johns Hopkins epidemiologist said according to criteria established by the Surge