China agreed to cap emissions. How are the goals stated by China and U.S. attainable, and who would be the winners and losers? Plus, banks are being fined because their traders manipulated the foreign exchange markets. We look at how and why the offenders did what was thought to be impossible. Finally, Hostess Brands, which makes Twinkies and other snacks, was bought out of bankruptcy last year by a private equity firm. Now it’s about to be sold on for $1.5 billion. We explain how the Twinkie-maker was saved by private equity.