FILE PHOTO: A worker packs beef at the Marfrig Group slaughter house in Promissao, 500 km northwest of Sao Paulo October 7, 2011. REUTERS/Paulo Whitaker
FILE PHOTO: A worker packs beef at the Marfrig Group slaughter house in Promissao, 500 km northwest of Sao Paulo October 7, 2011. REUTERS/Paulo Whitaker