Scientists working in the Netherlands and Wisconsin have engineered a version of the highly lethal H5N1 “bird flu” that easily transmits in ferrets, the best animal model for human spread. This news has so alarmed a federal advisory panel that it has now asked the two leading scientific journals, Science and Nature, to censor the papers each lab has submitted for publication lest the information fall into the hands of terrorists. (Here’s the Page One coverage of the story from the New York Times and Washington Post.)