Defender teaches perseverance

Senior Master Sgt. Ronal Yokley, 403rd Security Force Squadron operations superintendent, at Keesler Air Force Base, Mississippi, has served in the Air Force since 1985 and will retire in July 27, 2017. During his time with the squadron, he has deployed three times to support missions in Afghanistan, Iraq and Kuwait. (U.S. Air Force photo/Staff Sgt. Heather Heiney)