Now Playing: 12-17-12 Marketplace

Democratic Sen. Diane Feinstein has plans to introduce a bill that would ban assault weapons, and that legislation is sure to attract attention and money from special interest groups. Sen. John Kerry, meanwhile, is one of the front runners for the next Secretary of State and if he gets the position, his home state of Massachusetts will have to hold a third Senate race in a little over two years. With Christmas just around the corner and many retailers offering free shipping, UPS and others will need to be smart in order to get all that stuff out in time. Rival jewelry stores are taking Zales to court over its advertising claims of selling the most brilliant diamonds. And in the last of our series "Food for 9 Billion," we explore how eating habits affect climate change.