Troopers from the 181st Chemical Company, 2nd Chemical Battalion, 48th Chemical Brigade out of Fort Hood, Texas, monitor chemical, biological, radiological and nuclear equipment to detect any possible hazardous contaminants that might be in the area or leaking from the rail cars during a Vibrant Response 13 field training exercise at the former Jefferson Proving Grounds near Muscatatuck Urban Training Center, Ind., Aug. 1. The Fort Hood soldiers demonstrated their ability to provide support to local, state and federal civilian authorities during the U.S. Army North led training exercise.