FILE - This March 29, 2012, file photo, shows beef trimmings left after a cow is butchered that are used to make the beef product that critics call "pink slime" during a plant tour of Beef Products ... more 
FILE - This March 29, 2012, file photo, shows beef trimmings left after a cow is butchered that are used to make the beef product that critics call "pink slime" during a plant tour of Beef Products Inc. in South Sioux City, Neb. An attorney for BPI on Tuesday, April 9, 2013, praised an Iowa judge's ruling that blocked the release of documents on food safety testing conducted for the Sioux Falls, S.D.-based company. Judge Dale Ruigh ruled last month that releasing the information would cause "irreparable harm" to BPI by revealing information about proprietary food-processing techniques. (AP Photo/Nati Harnik, File) less 
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Associated Press | Photo By Nati Harnik, File
Wed, Apr 10, 2013 2:12 PM EDT