Thom Hartmann 70 percent of all ground beef contains pink slime - used to be illegal
Channel: SXILL77
Date: 2012-03-09

But Gerald Zirnstein, a former United States Department of Agriculture scientist told ABC News that 70 percent of the ground beef found at the supermarket contains something he calls "pink slime."
Pink slime is created from waste trimmings. It is made by grinding together connective tissue and beef scraps that usually land in dog food, and treating it with ammonia hydroxide to kill bacteria.
Pink slime was illegal until Undersecretary JoAnn Smith pushed it through.
More info:
http://www.newjerseynewsroom.com/healthquest/pink-slime-the-jell-o-like-dog-meat-still-found-in-cafeterias-and-70-of-supermarket-beef