In a two-part series, senior investigative correspondent Armen Keteyian examined the business of genetic engineering and the growing impact it is having on the way we grow food, and what we eat. Part one take a look at the business practices of Mondsanto, a major bio-tech seed maker, which patents its genetically modified seeds. Monsanto sells the seed to farmers but prohibits them from replanting their seeds after harvest, a practice known to farmers for 11,000 years. In the story, the team found that Monsanto has been coming after small farmers for seed piracy, suing them when Monsanto suspects farmers of planting its patented seeds "illegally" even when those farmers have never purchased or planted and Monsanto products. Part two examines the secret changes to our foods and asks, why don't we, in the U.S., label genetically modified ingredients when it is done with regular practice in Europe, Japan, Australia and our trading partners? Whether we realize it or not, we probably ate something for dinner last night that had a DNA-altered ingredient in it, but the FDA says that these ingredients do not have to be labeled and therefore no one knows when they are eating genetically modified foods.