Army Staff Sgt. Joel Ray Campbell, survey team chief with
the Kentucky National Guard's 41s Civil Support Team, demonstrates the use of
an air detection device during the 141st Kentucky Derby at Churchill Downs in
Louisville, Ky., May 2, 2015. The 41st CST worked with other local agencies to
help monitor any potential Chemical, Biological, Radiological and Nuclear
threats at Derby.(Photo by: Staff Sgt. David Bolton, Public Affairs Specialist,133rd Mobile Public Affairs Detachment, Kentucky Army National Guard)
