Three non-profit agencies have published a booklet to clarify US animal researchers' responsibilities under the Freedom of Information Act (FOIA) in light of escalating threats by animal-rights activists. Responding to FOIA Requests: Facts and Resources gives advice on how to deal with information requests under the act, which activists are increasingly using to target scientists. The publication, by the National Association for Biomedical Research, the Federation of American Societies for Experimental Biology and the Society for Neuroscience, gives such tips as not posting personal data online.