U.S. Air Force Senior Airman Paul Richter, a search and extraction medic with CERFP (CBRN - Chemical, Biological, Radiological, Nuclear - Enhanced Response Force Package), Colorado National Guard, uses a petrogen oxy-gasoline cutting torch system to cut away the mangled metal of a man-made rubble pile in an effort to extract a mock victim during a natural-disaster training scenario as part of the 2013 Vigilant Guard Exercise at the North Metro Fire Rescue District Training Center in Northglenn, Colo., July 24, 2013. Vigilant Guard is a series of federally funded disaster-response drills conducted by National Guard units working with federal, state and local emergency management agencies and first responders. (U.S. Army National Guard photo by Spc. Zach Sheely/Released)