LANGLEY AIR FORCE BASE, Va. -- Staff Sgt. Nathaniel Robinson Jr, 1st Operations Support Squadron aircrew flight equipment craftsman poses with Chief Master Sgt. Scott Dearduff, command chief for the 9th Air Force and U.S. Air Forces Central Command, after the chief presented him with a coin during his visit Sept. 11. Chief Dearduff visited with Airmen and toured several Langley squadrons after attending the Air Combat Command change-of-command ceremony Sept. 10. (U. S. Air Force photo/Senior Airman Zachary Wolf)