Special Agent Jennifer Steel, an Air Force Office of Special Investigations forensic science consultant, reviews a practical exercise April 15 with people from bioenvironmental, AFOSI, security forces and the fire department at Vance Air Force Base, Okla., on how to preserve and process a chemical or weapon-of-mass-destruction scene that may be a result of criminal activity. (U.S. Air Force photo/Capt. Tony Wickman)