Wal-Mart Stores got a new CEO this year, and he appointed a new president for the company's US stores. The two leaders have taken over a business that has been struggling in many ways -- including labor protests in the US and corruption investigations overseas -- but by far the biggest problem has been financial. Wal-Mart sales are not growing this year, and they didn't increase last year, either. CEO Doug McMillon said Wal-Mart still has problems keeping the right items in stock and helping customers get through checkout lines quickly. Wal-Mart will be spending more to build up its e-commerce operations. The company is working to offer a whole range of delivery services.