RAF Alconbury is an active Royal Air Force station located near Huntingdon, Cambridgeshire, England. Constructed in 1937-1938, it commenced operations in May 1938 under RAF Bomber Command. During World War II, from 1942 to 1945, the station was utilized by the United States Army Air Forces, including the 93rd Bomb Group of the Eighth Air Force. Post-war, the base was reactivated by the US Air Force in 1951, a role it continues to hold. Flying operations at RAF Alconbury ceased in 1995, and a significant portion of the land, including the runway, was sold in 2009 for the development of Alconbury Weald. Despite earlier announcements in 2015 regarding its closure by 2020, this decision was reverted due to cost-effectiveness. RAF Alconbury remains operational as a support base for the Joint Analysis Center. Historically, it hosted various units such as the 85th Bombardment Squadron, 10th Tactical Reconnaissance Wing, 527th Tactical Fighter Training Aggressor Squadron, and 10th Tactical Fighter Wing. Currently, the primary occupant is the 423d Air Base Group, part of the 501st Combat Support Wing under US Air Forces in Europe – Air Forces Africa. The airfield features one main asphalt runway, 12/30, measuring 2,500 meters, along with three concrete runways from WWII era: 06/24 (1,750 meters), 12/30 (1,235 meters), and 18/36 (1,235 meters).