Bruce Shapiro's regular report on the week's news and politics from the US. As the health impacts of diesel fuel become more well known, countries from Korea to Mexico and Germany are introducing strict new laws for diesel cars. Some countries prohibit high polluting vehicles from cities altogether. But here in Australia, where diesel fuel kills more Australians than the annual road toll, we are buying more and more diesel cars. What's going on? Laurie Matheson came to prominence as the man who brought down David Combe in the Ivanov spy scandal. But just who was Laurie Matheson?