When the 65 steel drums crossed from the Canadian border in late April, the accompanying documents said they contained honey from Canada, according to U.S. government officials. Since most food products from Canada are considered safe, the honey normally would have sailed through U.S. customs. But U.S. inspectors noticed something odd. The green steel drums were marked as containing apple concentrate from China, one official said. When Food and Drug Administration investigators examined the honey inside, they found chips of green paint -- most likely from the drums themselves -- floating at the bottom of some drums. And laboratory tests...