its place was taken by Detachment 508, 301st Fighter Wing. After two years the group was once again activated. The group trained in fighter tactics, upgrading to the F-105D and F-105F in 1980. The unit inactivated and its mission, personnel and equipment were absorbed by the activating 419th Tactical Fighter Wing. Air Force Materiel Command The 508th Aerospace Sustainment Wing was activated in February 2005 as Air Force Materiel Command reorganized its management offices into a structure of wings, groups and squadrons. It sustained existing weapons and support systems and assisted with the acquisition new systems. It served all United States military services, civil agencies and a number of foreign countries. Its support included acquisition, engineering and technical modification, modernization, as well as maintenance, repair and planning. Wing functions included acquisition, modification, modernization and maintenance and repair of the systems it supported. Its 508th Aircraft Sustainment Group acted in concert with the General Dynamics F-16 Fighting Falcon System Program Office at Wright-Patterson Air Force Base to direct F-16 "production, sustainment, engineering and manufacturing development, modification and worldwide deployment" for F-16 aircraft for units of the United States Air Force and the air arms of 18 foreign nations. This included foreign co-production and is still among the most complex acquisition program in the Department of Defense. Its 508th Mature Aircraft and Simulator Sustainment Group, and later, the 558th Aircraft Sustainment Group was responsible for acquiring improved capabilities and sustainment for 36 different aircraft weapon systems. "Mature aircraft" are out of production but still active in the Air Force inventory. The largest programs were associated with the Fairchild A-10 Thunderbolt II, Cessna T-37 Tweet and Northrop T-38 Talon. The groups also supported aircraft not in the active Air Force inventory that were flown by foreign countries or other agencies of the United States. This group included the McDonnell F-4 Phantom II, Northrop F-5 Freedom Fighter, Douglas C-47 Skytrain and others. Its 508th Attack Sustainment Squadron executed programs to sustain and improve the A-10 aircraft. Responsibilities include planning, programming and budgeting for modification and structural upgrade programs for the Thunderbolt II. In addition, the wing managed sustainment programs for aerial targets and training devices for aircraft and for space systems and control and air traffic control towers. The wing also prepared for sustainment programs for the Lockheed Martin F-22 Raptor and Lockheed Martin F-35 Lightning II aircraft. The wing was inactivated in 2010