Airmen immediately don their gas masks and other mission oriented protective posture gear after notification of a simulated ground attack during a mobility exercise, at Joint Base Lewis-McChord, Wash. Reservists from the 446th Airlift Wing have just one more UTA to knock out lots of training requirements prior to the September operational readiness exercise and the October operational readiness inspection. (U.S. Air Force illustration by Staff Sgt. Frances Kriss)