Senior Airman Mark Hill (left), Staff Sgt. Dominique Walker, and Airman 1st Class Ronald Rish perform a site survey in the "rubble room" as part of a training scenario at the Center for National Response in Gallagher, W.Va., March 24, 2010. The Air Force District of Washington sent members of their chemical, biological, radiological, nuclear, and high yield explosives response force, which combines the bioenvironmental engineers, civil engineering readiness, emergency management, and fire emergency services, to the training facility in two groups, each for a week long training event to give them the skills necessary to handle real world emergency situations. (U.S. Air Force photo by Staff Sgt. Renae L. Saylock)