I often question the food supply here in the U.S. I've known and talked to too many people in the food industry to think our food is all A-OK. The USDA as far as I'm concerned, is just about worthless as are most government agencies. I won't use this entry to rant too much about said agency but the "pyramid" crap we've been fed should be proof enough.
However, if you need more proof, here it is.
It's important that you read the entire article. To say I'm stunned, shocked, and disgusted would be an understatement.
That is all.