Firefighters triage victims of a simulated bioterrorism attack at the Armed Forces Reserve Center during the Portland Area Capabilities Exercise (PACE) Setter at Camp Withycombe in Clackamas, Oregon, May 22, 2013. The purpose of the PACE Setter exercise is to test regional and interagency response to public health incidents affecting multiple agencies. (Photo by Staff Sgt. April Davis, Oregon Military Department Public Affairs)United States airman wearing an M17nuclear, biological, and chemical warfare mask and hood