Survive and Operate
U.S. Air Force Chief Master Sgt. Jane Whitehouse, left, evaluates airmen of 128th Air Refueling Wing, during an Ability to Survive and Operate exercise, April 13, 2013, at Gen. Mitchell Airfield, Wis. The training exercise helps prepare airmen from the Wisconsin Air National Guard for operations in chemical, biological, radioactive, and nuclear environments. (Air National Guard photo by Staff Sgt. Christopher Wenzel/Released)