Greenpeace activists stopped a trainload of US maize at the vorder to Mexico in Rio Grande. "The latest scientific analysis shows that one third of US maize entering Mexico is contaminated with GE varieties from Monsanto. Mexico is the centre of diversity of maize, one of the world`s three most important food crops and it`s at serious risk from GE contamination."<a href="http://www.greenpeace.org/international_en/news/details?item_id=302714">Greenpeace Action</a>