As soon as the Mississippi River reopens to barge travel, rafts of corn kernels will head down river en route to their final destination -- Southeast Asia. Along the way kernels will be tested and retested for traces of Starlink, a genetically modified corn now banned around the world. Last fall Starlink turned up in taco shells and corn chips, prompting mass recalls and a shake up on the export market. The corn's manufacturer continues to push for full governmental approval which would allow for human consumption, but with the spring thaw, Midwestern grain elevators and their customers are preparing for round two. Mainstreet Radio's Erin Galbally reports: