U.S. Soldiers assigned to the 52nd Weapons of Mass Destruction-Civil Support Team, Ohio Army National Guard, line up vehicles in preparation for deployment to a simulated Chemical, Biological, Radiological, Nuclear incident site during exercise Vibrant Response 13-2 at Muscatatuck Urban Training Center, Muscatatuck, Ind., July 30, 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. (U.S. Army Photo by Staff Sgt. Alexandria Brimage-Gray/Released)