In an unprecedented event, CNBC cameras go behind-the-scenes at McDonald's-- the world's largest and most successful food service business. During the program, CNBC takes viewers to McDonald's headquarters, test kitchens and labs, providing a close look at the immense testing and research behind every product. CNBC travels to China where McDonald's currently has 780 restaurants and is moving aggressively to expand and eclipse rival Yum Brands, which owns KFC and Pizza Hut. CNBC explores the highly-debated criticism McDonald's has received regarding its contribution to obesity in Americans. CNBC profiles one McDonald's store introducing its owner/franchisee, managers, employees and customers. Each of the 30,000 stores contributes to McDonald's bottom line. As you will see, running a McDonald's store is more than just flipping burgers.