Two U.S. Soldiers assigned to the 52nd Weapons of Mass Destruction-Civil Support Team, Ohio National Guard collect samples to detect chemical, radiological or nuclear incidents during a scenario as part of the Vibrant Response 13-2 training exercise at Muscatatuck Urban Training Center in Butlerville, Ind., July 31, 2013. Vibrant Response is a U.S. Northern Command-sponsored field training exercise for chemical, biological, radiological, nuclear and high-yield explosive consequence management forces designed to improve their ability to respond to catastrophic incidents. The civil support team is responsible for detecting and identifying chemical, biological and radiological agents in the area prior to first responders entering the incident site. (U.S. Army photo by Staff Sgt. Alexandria Brimage-Gray/Released)