Team Vance Airmen selected for below-the-zone promotion Published June 26, 2013 VANCE AIR FORCE BASE, Okla. -- Three Vance Airmen were selected for below-the-zone promotion to Senior Airman. Below the Zone is a special program that allows qualified Airmen to sew on their senior airman stripe six months early. Those selected are: Airman 1st Class Christina Sullivan, a force management technician with the 71st Force Support Squadron; Airman 1st Class William Ensrud, an aerospace physiology technician with the 71st Medical Operations Support Squadron; and Airman 1st Class Alejandro Figueroa, a patrolman with the 71st Security Forces Squadron.