It is the biggest scandal in years in the auto business as VW admitted cheating diesel vehicle emissions tests in the United States. And now South Korea, which said it would conduct its own investigation. And Europe, too, with a French minister calling for an investigation in the EU. Shares fell to a new three-year low and there's an $18 billion fine hanging over the automaker's head. There may be pink slip hanging over CEO Martin Winterkorn's head. The full board meets this week on whether to extend his contract.