The attacks of September 11th and their aftermath brought some stark realities to bear in this country and abroad. Not only were we suddenly vulnerable to attacks on our native soil, but our ability to respond to the potential medical needs of mass casualties was also proven to be severely wanting. Thankfully, there were far fewer victims than expected that day, but subsequent drills simulating the aftermath of 9/11-like events showcased the immense failure of ERs nationwide in their ability to cope with even a moderate number of victims in a mass casualty situation. Koenig's Disaster Medicine is the definitive reference on disaster medicine. It outlines necessary areas of proficiency for health care professionals handling mass casualty crises. It also covers in-depth strategies for the rapid diagnosis and treatment of victims exposed to biological, chemical, or radiological agents, spanning the full spectrum of potential situations.