Staff Sgt. Jessica Feil dons a mask Nov. 16 during a readiness exercise at Fort Leonard Wood, Mo. The exercise is designed to give readiness Airmen training scenarios developed from lessons learned during operations Iraqi Freedom and Enduring Freedom. The two-day exercise is the part of a two-week training class here. Sergeant Feil is a readiness technician with Detachment 1, 823rd Red Horse, Tyndall Air Force Base, Fla. (U.S. Air Force photo/Senior Airman Brian Ferguson)