Three of the wing's groups focused on specific airlift aircraft. The 516th Aeronautical Systems Group directed the modernization, development, test, production, deployment and sustainment of C-17 aircraft, F117 engine, support, and training systems. This Department of Defense airlift program provides vital airlift capability in support of U.S. national interests. Its 716th Aeronautical Systems Group directed the modernization, development, test, production, deployment and plans for sustainment of C-5 aircraft, support and training systems. This Department of Defense airlift modernization program provides strategic airlift capability in support of U.S. national interests. And its 866th Aeronautical Systems Group directed the modernization, development, test, production, deployment and plans for sustainment of the C-130 aircraft, support, and training systems. This Department of Defense airlift program provides tactical airlift capability in support of U.S. national interests.