First up, we've been reporting on merger talks between Burger King of the US and Tim Horton's of Canada. If it happens, Burger King would move its tax headquarters to Canada to save on American taxes. Today, there's news famed investor Warren Buffett is supplying about a quarter of the financing for the Burger King deal. This implies that Buffett is helping to fund a deal some republicans and democrats would regard as a legal but highly controversial tax dodge. And some top politicians also have a stake in these so-called tax inversion maneuvers. Now, back in May the biggest of inversion deals came up short. U.S. pharma giant Pfizer tried and failed to buy the British drugs company AstraZeneca. Under UK rules, Pfizer couldn't try again for three months. That means Pfizer's free to try again starting today. More on the overseas profits Pfizer wanted to keep away from the U.S. treasury. Plus, when it comes to the so-called "sharing economy," there's controversy about whether the likes of AirBnB or Uber violate local regulations for these sorts of things. But how have these new business models changed the world of insurance?