U.S. Air Force GEN. Gene Renuart (left), Commander, United States Northern Command, Becky Skillman, Indiana Lieutenant Governor, and LT. GEN. H. Steven Blum (center, right), CHIEF, National Guard Bureau, attend a briefing with the National Guard Public Affairs Rapid Reaction Team at Muscatatuck Training Center, Camp Atterbury, Indiana, on May 12, 2007, during Exercise Vigilant Guard, a joint military and civilian training exercise simulating the detonation of nuclear devices in a metropolitan area. (U.S. Army photo by SGT. Jim Greenhill) (Released)