Dec. 11, 2012: Dr. Timothy Johnson
After 40 years at WCVB and eventually ABC News' Good Morning America - Dr. Timothy Johnson is retiring at the age of 76. WCVB's Medical editor began his career in 1972 hosting the show, "House Call." He began contributing to ABC News and GMA in 1976. Dr. Johnson will be a guest to discuss his four decades of medical reporting.