KFC Corporation, based in Louisville, Kentucky, is the world's most popular chicken restaurant chain. It specializes in freshly made chicken sandwiches made according to the special Colonel Sanders’ recipe - a secret blend of 11 herbs and spices Colonel Harland Sanders originated more than a half-century ago. The KFC website says: “Every day, more than 12 million customers are served at KFC restaurants in 109 countries and territories around the world. KFC operates more than 5,200 restaurants in the United States and more than 15,000 units around the world.” Apart from chicken, KFC serves more than 300 other products, including a salmon sandwich in Japan. KFC is part of Yum! Brands, Inc., the world's largest restaurant company. It has annual revenues in excess of $11 billion.