U.S. Soldiers assigned to the 51st Civil Support Team, Michigan Army National Guard, don protective suits at the beginning of their initial reconnaissance mission during exercise Vibrant Response 13-2., at Camp Atterbury, Ind., Aug. 10, 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 Spc. Bradley Wancour/Released)