Airman 1st Class Samuel Mericle (left) and Airman 1st Class Eric Reist read a chemical strip during a radial survey to determine radiation levels and the types of hazardous chemicals present after a simulated explosion in front of the Base Exchange during 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 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)(released)