Barajas Terminal 4 it was used on several occasions to reduce congestion at the old overloaded Barajas terminals. Operated by AENA, in 2011 it handled 27,801 passengers and 11,489 flight operations. Beginning February 1, 2013, Torrejón-Madrid Airport was permanently closed to all civilian and general aviation traffic. Current military use Since its creation, Torrejón Air Base was also the base of a Spanish Air Force fighter wing, an aerial firefighting group and the flight test group of the Spanish Air Force (Ala 12 of the Spanish Air Force, the 54 Flight Test Group and the 43 Grupo dedicated to aerial firefighting). Currently the Ala 12 of the Spanish Air Force operates two squadrons equipped with the McDonnell Douglas F/A-18 Hornet, the 54 Flight Test Group operates with a very diverse range of airplanes and the 43 Grupo operates with Bombardier 415 and Canadair CL-215. In order to fill the space left by the withdrawal of USAF, the Spanish Air Force moved into Torrejón Air Base the following units that were not based there before: the 45 Grupo dedicated to VIP transport and the 47 Grupo dedicated to electronic warfare. Based units Flying and notable non-flying units based at Torrejón. Spanish Air and Space Force Air Combat Command Headquarters Air Combat Command Command and Control System Headquarters Central Command and Control Group Aerospace Surveillance and Control System Headquarters Aerospace Surveillance and Control System Space Surveillance Operations Center General Air Command Wing 12 121 Squadron – C.15/CE.15 (EF-18A/B Hornet) 122 Squadron – C.15/CE.15 (EF-18A/B Hornet) 43 Air Force Group UME (Military Emergencies Unit – Search and Rescue & Forest Fires Unit) 431 Squadron – UD.13T (CL-215T) and UD.14 (CL-415) 432 Squadron – UD.13T (CL-215T) and UD.14 (CL-415) 45 Air Force Group (Royal, Government & VIP Transport) 451 Squadron – T.18 (Falcon 900) and T.22 (A310) 47 Joint Group of Air Forces (Reconnaissance, Electronic Warfare, Transport, In-flight Refuelling) 471 Squadron – T.17 (Boeing 707) 472 Squadron – T.12 (C-212 Aviocar) and TM.11 (Falcon 20) Aeroevacuation Medical Unit Armament and Experimentation Logistics Center – C.15/CE.15 (EF-18A/B Hornet), E.25 (C-101EB Aviojet) and T.12 (C-212 Aviocar) Center for Aerospace Observation Systems – Helios Deployment Support Air Medical Unit Intendancy Logistics Center Madrid Salvage Coordination Center (RCC Madrid) School of Aeronautical Techniques Transmission Group Transmission Squadron No. 5 Personnel Command Aerospace Medicine Instruction Center Other Air Operations Squadron No. 1 – Madrid Operational Air Circulation Group Military