U.S. Army Sgt. Cooper Allen, foreground right, a chemical agent decontamination specialist with the 115th Maintenance Company, Utah Army National Guard, and Sgt. Jose Bulow, left, a survey team member with the 64th Civil Support Team, New Mexico Army National Guard, assist a mock victim at Exempla St. Joseph Hospital in Denver July 23, 2013, during a natural disaster training scenario decontamination exercise as part of Colorado's 2013 Vigilant Guard exercise. 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)