U.S. Air Force MASTER SGT. Ken Jacobson, an Air National Guardsman assigned to the 42nd Civil Support Team, North Carolina National Guard (NCANG), Charlotte, N.C., checks for chemical and biological readings during one of his final exams at the Civil Support Training Class, Fort Leonard Wood, Mo., on Oct. 19, 2004. (U.S. Air Force photo by TECH. SGT. Brian Christiansen) (Released)