A decade after anthrax sent by mail left five dead and put America on edge, questions continue to be raised about the adequacy of the science used to identify a suspect and on the ability to prevent such bioterrorism, specialists said at a AAAS retrospective on the attacks.

Agencies and institutions must take steps to enhance the screening of those who work with dangerous pathogens, they said, while also assuring the public that the criminal justice process, in the event of any future attacks, will work and work well.