Indiana Air National Guard Staff Sgt. Shannon Brown, Indianapolis, 181st Medical Group bio-environmental engineer, posts an accountability roster during 81st Troop Command's emergency response unit validation training Aug. 22, at Camp Atterbury, Ind. "I think we're going to learn a lot this week, and Friday's going to come and we're going to pass with flying colors," she said of the unit's training and validation set for Aug. 26. The response unit is a mix of Air and Army Guard troops throughout Indiana and known as the 19th CERFP or Chemical, Biological, Nuclear, Radiological and high-yield Explosive Enhanced Response Force Package.