Anatomy of a Burger

Confidential grinding logs and other records and interviews reveal the ingredients and E. coli issues in a typical hamburger sold by grocers and fast-food restaurants. This patty was made by the food giant Cargill, which recalled 844,812 pounds of ground beef on Oct. 6, 2007, after an estimated 940 people were sickened, including Stephanie Smith, 22, of Cold Spring, Minn.