GRISSOM AIR RESERVE BASE, Ind.,-- Tech. Sgt. Venetia Williams, 434th Services Flight, uses her Airman's Manual to reference various aspects of wartime skills training during a recent unit training assembly. Sergeant Williams, along with other members of the 434th Air Refueling Wing, participated in an exercise to enhance their knowledge of operating in a simulated chemical environment. (U.S. Air Force Photo/Tech. Sgt. Patrick Kuminecz)