A bin of ground beef is seen at the Fresh & Easy Neighborhood Market meat processing facility in Riverside

 
A bin of ground beef is seen at the Fresh & Easy Neighborhood Market meat processing facility in Riverside
A bin of ground beef is seen at the Fresh & Easy Neighborhood Market meat processing facility in Riverside, California March 29, 2012. U.S. meat packers' losses on beef sales have doubled since a controversy over ammonia-treated scraps dubbed "pink slime" exploded two weeks ago, with margins nearing their lowest in at least 22 years on Thursday, an industry estimate showed. Fresh & Easy says they do not use the ammonia-treated filler in their beef products. REUTERS/Alex Gallardo (UNITED STATES - Tags: FOOD ANIMALS BUSINESS)