LANGLEY AIR FORCE BASE, Va. -- Staff Sgt. Travis Weeks and Tech. Sgt. David Bethel, 2nd Mission Readiness Squadron manpower analysts, pin staff sergeant on Senior Airman Dustin Estepp, 1st Communication Squadron cable and antenna maintenance journeyman, here Aug. 20. Air Force officials selected 15,223 of 30,574 eligible senior airmen for promotion to staff sergeant for a selection rate of 49.79 percent. (U.S. Air Force photo/Airman 1st Class Gul Crockett)