Members of the Ohio Task Force 1, part of the Federal Emergency Management Agency's National Urban Search and Rescue Team, search through a maze of mangled automobiles for "survivors" in a collapsed parking garage at Muscatatuck Urban Training Center in Butlerville, Ind., July 17, during Vibrant Response 10.2. The scenario is a U.S. Army North national emergency response exercise aimed at preparing our first responders for a nuclear blast in a major U.S. city.