Three years after genetically engineered maize bannedfrom human consumption turned up in taco shells and was pulled from themarket, contaminated grain is still showing up in the nation`s corn supply.A federal testing program found traces of the banished grain, calledStarLink, in more than 1 percent of samples submitted by growers andgrain handlers in the past 12 months, government records show.</p><p><a href=" http://www.kentucky.com/mld/kentucky/news/nation/7386628.htm?">Contaminated grain still showing up in corn suppl</a>