U.S. soldiers assigned to Charlie Company, 1st Battalion, 65th Infantry Regiment, Puerto Rico Army National Guard, Chemical, Biological, Radiological, Nuclear and High-Yield Explosive Enhanced Response Force Package arrive at Rosecrans Air National Guard Base in St. Joseph, Mo., Nov. 4, 2012, to participate in Vigilant Guard 2012. 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 photo by Jennifer Archdekin)