310th Bombardment Wing was activated in 1952 as a Strategic Air Command unit, receiving Boeing B-29 Superfortress bombardment training from 90th Bombardment Wing, April–August 1952. From February through May 1953, the 310th Bomb Wing provided bombardment training to the 40th Bombardment Wing. The wing replaced the propeller-driven B-29s with new Boeing B-47E Stratojet swept-wing medium bombers in 1954, capable of flying at high subsonic speeds and primarily designed for penetrating the airspace of the Soviet Union. It participated in SAC REFLEX deployments, deploying to RAF Upper Heyford 10 March – 8 June 1955, and at RAF Greenham Common, 3 October 1956 – 9 January 1957, both in the United Kingdom. The wing gained a strategic missile squadron in April 1961. First CGM-16 Atlas missiles went on alert in September 1962. In the early 1960s, the B-47 was considered to be reaching obsolescence, and was being phased out of SAC's strategic arsenal. B-47s began being sent to AMARC at Davis–Monthan in early 1965; was inactivated in late June. Air Force Space Command On 1 September 1991, the third wing to hold the "310" designation, the 310th Training and Test Wing (310 TTW), assumed the ICBM testing and training mission from the Strategic Missile Center (the former 1st Strategic Aerospace Division) at Vandenberg AFB, California under the Twentieth Air Force. After the removal of ICBMs from alert status at the end of the Cold War, the wing continued to train Minuteman crews and to test accuracy and reliability of Minuteman and Peacekeeper missiles. The 310 TTW also assisted in testing the Global Positioning System (GPS) from April 1992 – May 1992. It was reassigned to Air Combat Command on 31 May 1992. It was inactivated on 1 July 1993. The number 310 was again reutilized with the stand up of the 310th Space Group on 4 September 1997. The group was created around its original squadron, the 7th SOPS, and has grown rapidly with the realization of the critical role the Air Force Reserve can play in the future of space operations. The group has been tremendously successful in its initial missions and has been tasked with reviewing future active/Reserve partnerships in space to identify potential areas where the AF Reserve can add value in the space arena. In 2008 Air Force Reserve Command officials upgraded the group to a wing at what was then Schriever Air Force Base, CO. The 310th