 In 1987, it started featuring correspondent Peter Mehegan's travels in a restored 1969 Chevrolet Impala coupe, which became the most recognizable aspect of the "Main Streets" episodes.In addition to the program's regular segments, other general subjects discussed on "Chronicle" have included people diagnosed with rare forms of cancer, and other life-threatening diseases.The early stages, treatment, and the effects their illnesses have on their overall life and mental well-being are all depicted.