Ken Rosenthal, founder of the pioneer of Panera Bread, died in 81
Ken Rosenthal opened a bakery cafe in the St. Louis area, using sour bread as its star and built it into a small chain that would turn into Panera bread, and on February 14 at him Dead at home in Scottsdale, Arizona. 81. His wife Linda Rosenthal said the cause was Alzheimer's disease. Mr. Rosenthal…