Colorado National Guardsmen Army Staff Sgt. Steve Russ and Sgt. Robert Chavez from the 8th Civil Support Team dispose hazardous material they found when they conducted a search and decontamination due to a notional F4 tornado that tore through the Bonfils Blood Center in Denver during the Vigilant Guard Exercise July 23. Vigilant Guard is an exercise focused on preparing for domestic emergencies and catastrophic events through interagency coordination.(U.S. Air National Guard photo by Staff Sgt. Nicole Manzanares)