It's a thorny question: what is the worst car of all time? We give our answers based on personal experience and our years of testing cars at Consumer Reports. Our viewers also chime in with their picks. Unsurprisingly, the list takes on a more modern bent with several frequently named contenders: Yugo, Pontiac Aztek, and Chevrolet Vega, to name a few. We finish up responding to viewer comments about our discussion of the Chevrolet Tahoe and GMC Yukon.