Members of the Ohio Task Force 1, part of the Federal Emergency Management Agency's National Urban Search and Rescue Team, use soap and water to decontaminate a "survivor" of a nuclear explosion at Muscatatuck Urban Training Center in Butlerville, Ind., July 17, during Vibrant Response 10.2. The scenario is part of U.S. Army North's national emergency response exercise aimed to prepare first responders for a nuclear blast in a major U.S. city.