 This number balanced those lost by the 34th BS.In March 1999, the Air Force announced a reorganization plan that makes Ellsworth AFB and the 28 BW partners in the new Expeditionary Air Force (EAF) concept, now known as the Air & Space Expeditionary Force (AEF).The 28 BW was named a lead wing in the EAF, which enabled the 77 BS to gain six additional B-1Bs, and Ellsworth AFB to gain about 100 additional military personnel.