For the fourth time in recent years, a committee of the US National Research Council has warned regulators and developers of genetically modified organisms (GMOs) that science knows too little about how the novel organisms will behave in the real world. The report urges multiple containment systems for engineered animals and plants, reports the "Scientist".</p><p><a href="http://www.biomedcentral.com/news/20040121/02">The Scientist : NRC warns on GMOs again</a></p><p><a href="http://www.nap.edu/books/0309090857/html/">NRC-Report: Biological Confinement of Genetically Engineered Organisms</a>