major command identities. After one year in Strategic Air Command and another year in Air Combat Command, 20th Air Force was moved under Air Force Space Command in 1993. December 2009 marked the final transition of 20th Air Force to the newly created Air Force Global Strike Command. Twentieth Air Force Headquarters' changed its location in 1993, moving from Vandenberg AFB, Calif., to its current home at FE Warren Air Force Base, Wyoming. Today 450 Minuteman III missiles remain on alert. Twentieth Air Force headquarters is unique in that it has dual responsibilities to Air Force Global Strike Command and United States Strategic Command. As the missile Numbered Air Force for AFGSC, 20th Air Force is responsible for maintaining and operating the Air Force's ICBM force. Designated as STRATCOM's Task Force 214, 20th Air Force provides on-alert, combat ready ICBMs to the president. Combined with the other two legs of the Triad, bombers and submarines, STRATCOM forces protect the United States with an umbrella of deterrence. Lineage Established as Twentieth Air Force and activated on 4 April 1944 Inactivated on 1 March 1955 Activated on 1 September 1991. Redesignated as: Twentieth Air Force (Air Forces Strategic) on 1 December 2009. Assignments United States Army Air Forces, 4 April 1944 Attached to United States Strategic Air Forces in the Pacific, 16 July-6 December 1945 Pacific Air Command, U.S. Army, (later Far East Air Forces), 6 December 1945 – 1 March 1955 Strategic Air Command, 1 September 1991 Air Combat Command, 1 June 1992 Air Force Space Command, 1 July 1993 Air Force Global Strike Command, 7 August 2009 Components World War II VII Fighter Command, 5 Aug 1945-c. Aug 1946 XX Bomber Command, 19 April 1944 – 18 July 1945 XXI Bomber Command, 9 November 1944 – 18 July 1945 Assumed direct control of XXI Bomber Command organization, 16 July 1945 58th Bombardment Wing, 29 Jun-12 Oct 1944; 16 July 1945 – 15 November 1945 73d Bombardment Wing, 16 July 1945 – 13 March 1946 313th Bombardment Wing, 16 July 1945 – 13 March 1946 314th Bombardment Wing, 16 July 1945 – 15 May 1946 315th Bombardment Wing, 16 July 1945 – 30 May 1946 301st Fighter Wing, 21 May 1945 – 29 November 1945 Detached 21 May 1945 – 14 August 1945 3d Photographic Reconnaissance Squadron Attached to: Twentieth Air Force, 1 November 1944 Attached to: XXI Bomber Command, December