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In 2008, for example, Mexican authorities rejected a U.S. beef shipment because its copper levels exceeded Mexican standards, the audit says. But because there is no U.S. limit, the FSIS had no grounds for blocking the beef’s producer from reselling the rejected meat in the United States.

Peter Eisler covers the ‘growing concern’ of tainted beef in the U.S. (or possibly a clever new case of product integration by Duracell) for USATODAY.com. [Thanks to Colin for the link.]