The beef product known as pink slime or lean finely textured beef is frozen on large drums as part of the manufacturing process at the Beef Products Inc. plant in South Sioux City, Nebraska March 29, 2012. [Reuters] At least four reporters have been ordered to turn over documents to attorneys representing America's largest “pink slime” producer, Beef Products Inc, in a $1.2-billion defamation lawsuit against ABC News and other news organizations.