LANGLEY AIR FORCE BASE, Va -- Lt. Gen. Gary North, commander of 9th Air Force and U.S. Air Forces Central Command, presents Staff Sgt. Jennifer Griffiths, Langley Airman Leadership School instructor, with a certificate of promotion to technical sergeant Feb. 20 in Langley’s ALS conference room. General North presented two promotions under the Stripes for Exceptional Performers program during his visit. (U.S. Air Force photo/Airman 1st Class Zachary Wolf)