Add Yahoo as a preferred source to see more of our stories on Google. Lettuce on a burger bun - Miguel Villagran/Getty Images The last thing you'd want on your flame-grilled Whopper is, well, whatever ...

The fast food industry has been plagued by its fair share of scandals for years. Everything from E. Coli outbreaks to hot coffee lawsuits have made the news, and new ones pop up so frequently you ...