Like many of us, Ian Cheney and Curt Ellis, co-producers of the film "King Corn," wanted to understand corn. They started off their journey by getting a professional hair analysis. Turns out, the carbon in their bodies originates from corn. It seems most of us these days are made of commodity corn that must be processed before we can eat it. (Fact: An Iowa farmer can no longer feed herself by the corn on her farm.) 

Where, oh where, does commodity corn go?