Altus master sergeants selected for promotion Published March 20, 2014 By Staff Reports 97th Air Mobility Wing Public Affairs ALTUS AIR FORCE BASE, Okla. -- Four master sergeants from the 97th Air Mobility Wing were selected for promotion to the rank of senior master sergeant March 20, 2014. Out of the 14,823 eligible master sergeants in the Air Force, 999 were selected for promotion to senior master sergeant which is a selection rate of 6.74 percent. 97th AMW Wing Staff Agencies Master Sgt. Danielle Pier 97th Logistics Readiness Squadron Master Sgt. Charles Sheridan 97th Medical Group Master Sgt. Crystal Spedding 97th Security Forces Squadron Master Sgt. Walter Watkins