Today, in the first full day of defense testimony, the tobacco companies' witness in the state's trial discussed the volume of information on smoking and health available to Minnesotans. A key defense argument is that the dangers of smoking were well-known, therefore tobacco companies didn't mislead the public about health risks...as the state and Blue Cross Blue Shield claim. Minnesota Public Radio's Laura McCallum reports... Yesterday, University of Minnesota historian Hy Berman ended his testimoney with a Christopher Columbus' quote on the vice of tobacco. Today, he picked up his history lesson where he left off, moving int