TV icon popped up on the schedule a half-century ago
                                
                                
                                    (Newser) -
                                    Fifty years ago today at 3 pm in Philadelphia, what is now known as a summer replacement program debuted on the ABC TV network. That show, "American Bandstand," ran for 30-plus years. Its host, Dick Clark, frequently referred to as the oldest living teenager, introduced Chubby Checker, Frankie...