LANGLEY AIR FORCE BASE, Va. -- Chief Master Sgt. Scott Dearduff, command chief for the 9th Air Force and U.S. Air Forces Central Command answers a question from Senior Airman Hector Rivera Vazquez (right), 1st Operations Support Squadron aircrew flight equipment journeyman, during his visit Sept. 11. Chief Dearduff visited with Airmen and toured some of Langley's squadrons after attending the Air Combat Command change-of-command ceremony Sept. 10. (U.S. Air Force photo/Senior Airman Zachary Wolf)