Modern Marvels: Engage the satellite navigation, fire-up the fuel cell, and activate the radar-guided cruise control! You're in for the joyride of your life as we investigate what drives and will drive our vehicular destiny. In this 2-hour special, we talk to auto industry engineers, designers, historians, and futurists, and meet carmakers standing at the threshold of a brave new automotive world and on the verge of technical innovations that might prove as far-reaching as the switch from horses to horsepower.