Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Apr 6, 2012
See the full episode at http://video.pbs.org/video/2214315175 Discover just how large a role corn plays in the American food machine. See what else makes the system function on AMERICA REVEALED, Wednesdays, April 11 - May 2nd at 10/9c on PBS.