Tech. Sgt. Alberto Verastegui (right), 374th Security Forces Squadron exercise evaluation team member, inspects the gas mask of Senior Airman Justin Newman (left), 374th Security Forces Squadron patrolman, during a base exercise at Yokota Air Base, Japan, March 27, 2012. Airmen at Yokota participate in exercises to maintain their operational readiness capabilities. (U.S. Air Force photo/Osakabe Yasuo)