Ellsworth congratulates 'Below-the-Zone' selectees Published Dec. 8, 2008 28th Bomb Wing Public Affairs ELLSWORTH AIR FORCE BASE, S.D. -- Ellsworth selected three of 88 airmen first class eligible for promotion under the "Below-the-Zone" program, Dec. 8. When awarded, BTZ allows Airmen to be promoted to the rank of senior airman six months early. The selectees are: Airman 1st Class Ashley Barlow, 28th Medical Operations Support Squadron Airman 1st Class Ann Ginther, 28th Security Forces Squadron Airman 1st Class Joanne Perkins, 28th Medical Operations Support Squadron