Interview subjects

* Steven Kornguth, professor of neurology and biomolecular medicine, University of Wisconsin-Madison.

Gary Milhollin, director, Wisconsin Project on Nuclear Arms Control, Washington, DC.

Jordan Richie, analyst, Wisconsin Project on Nuclear Arms Control.

* Ronald Taylor, professor of biochemistry, University of Virginia, Charlottesville.

* Raymond Zilinskas, Center for Public Issues in Biotechnology, University of Maryland Biotechnology Center, College Park, Md.

* denotes factchecker