This complete history of Ellsworth Air Force Base tells the story of the base, units, and personnel that have been defending the United States for over seventy years, and traces the proud heritage of this South Dakota military facility beginning in World War II. Boeing B-17 Flying Fortresses, Boeing B-29 Superfortresses, Convair B-36 Peacemakers, and Boeing KC-135 Stratotankers have all stood at the ready on Ellsworth's runway. The current bomber out of Ellsworth is the B-1B Lancer, flown by the 28th Bomb Wing who continues to defend America now and into the future.