Fast Food Nation

The fast food industry is a massive, global market. The industry generates billions of transactions worth an estimated $100 billion annually.

Two of the biggest, YUM Brands and McDonald's, have footprints all over the world. YUM Brands, which includes, among others, Pizza Hut, Taco Bell, and KFC, has over 37,000 restaurants in over 110 countries.

McDonald's has over 32,000 stores in 117 countries and serves an average of 60 million customers a day. Not every idea generated by these fast food giants is an instant hit with the public, though.

View a list of 15 major fast food failures.