Investors and franchisees alike were shocked to learn of the death of McDonald's CEO, Jim Cantalupo, this morning in Florida. Mr. Cantalupo, who is credited with a dramatic turnaround of McDonald's in last year, was attending a franchisee convention in Orlando at the time of his death. His death appears to have been the result of a heart attack. Mr. Cantalupo was 60 years old. McDonald's has named its Chief Operating Officer, Charlie Bell, to replace Mr. Cantalupo.