Remember the pictures of the fish tomatoes? For years they were an unofficial emblem of the anti-GMO movement. They depicted how anti-freeze genes from an Arctic fish were forced into tomato DNA, allowing the plants to survive frost. Scientists really did create those Frankentomatoes, but they were never put on the market. (Breyers low-fat ice cream, however, does contain anti-freeze proteins from Arctic fish genes, but that's another story.)
The tomato that did make it to market was called the Flavr Savr, engineered for longer shelf life. Fortunately, it was removed from the shelves soon after it was introduced.
Although there are no longer any genetically modified (GM) tomatoes being sold today, the FDA's shady approval process of the Flavr Savr provides a lesson in food safety—or rather, the lack of it—as far as gene-spliced foods are concerned. We know what reallywent on during the FDA's voluntary review process of the Flavr Savr in 1993, because a lawsuit forced the release of 44,000 agency memos.
(Those same memos, by the way, also showed that FDA scientists had repeatedly warned their superiors about the serious health risks of genetically modified organisms [GMOs]. They were ignored by the political appointees in charge, who allow GMOs onto the market without any required safety studies.)