In a guide dedicated to the emergency responders who lost their lives in the September 11, 2001 attacks, a scientist with the US Department of Energy's Hanford Nuclear Reservation educates emergency personnel about types of weapons of mass destruction that terrorists might use, their health consequences, treatment options, and ways to minimize exposure to such agents. Includes a summary of recommendations, foreword by a member of the Ad Hoc Committee on Homeland Security, contributions from other scientists, and a glossary.